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\ab\af1\afs32 \ltrch \b\f1\fs32\ul\insrsid4132756\charrsid5336693 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid4132756 {\rtlch \af1\afs22 \ltrch \f1\fs22\ul\insrsid4132756 \par }\pard \ltrpar\qc \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid4132756 {\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid4132756 Carrying Out Calculations}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid4132756\charrsid6300681 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid4132756 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid4132756 \par }{\rtlch \ab\af0 \ltrch \b\f0\insrsid4132756 C}{\rtlch \ab\af0 \ltrch \b\f0\insrsid1909199 10}{\rtlch \af0 \ltrch \f0\insrsid4132756 \tab }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid1909199 Understand and use given formulae}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid4132756 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid4132756 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid14486842 {\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid14486842 Useful Web Links: \par }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid15480258 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid1909199 {\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid1909199 Learn.co.uk: Maths: Using formulae}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid1909199\charrsid13843570 \par }{\field\flddirty{\*\fldinst {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 HYPERLINK "}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199\charrsid13843570 http://www.learn.co.uk/default.asp?WCI=Unit&WCU=36017}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 " }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid3685437\charrsid11355614 {\*\datafield 00d0c9ea79f9bace118c8200aa004ba90b02000000170000003600000068007400740070003a002f002f007700770077002e006c006500610072006e002e0063006f002e0075006b002f00640065006600610075006c0074002e006100730070003f005700430049003d0055006e006900740026005700430055003d003300 36003000310037000000e0c9ea79f9bace118c8200aa004ba90b6c00000068007400740070003a002f002f007700770077002e006c006500610072006e002e0063006f002e0075006b002f00640065006600610075006c0074002e006100730070003f005700430049003d0055006e006900740026005700430055003d0033 00360030003100370000000000ff}}}{\fldrslt {\rtlch \af1\afs22 \ltrch \cs25\f1\fs22\ul\cf2\insrsid1909199\charrsid11355614 http://www.learn.co.uk/default.asp?WCI=Unit&WCU=36017}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 \par A small, but neat, introduction to using formulae. \par \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid1909199\charrsid13843570 The College Online: Mathematics \par }{\field\flddirty{\*\fldinst 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\cs25\f1\fs22\ul\cf2\insrsid1909199\charrsid11355614 http://dspace.dial.pipex.com/town/way/po28/maths/formulae.htm}}}{ \rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid4132756 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199 This article looks at famous mathematical formulae.}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid14486842 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid1909199\charrsid13529635 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid4132756\charrsid13529635 \par }\pard \ltrpar\ql \fi-1134\li1134\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin1134\itap0\pararsid4132756 {\rtlch \ab\af0 \ltrch \b\f0\insrsid4132756 C}{\rtlch \ab\af0 \ltrch \b\f0\insrsid14114069 10}{\rtlch \ab\af0 \ltrch \b\f0\insrsid4132756 .1}{\rtlch \af0 \ltrch \f0\insrsid4132756 \tab }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid9323870 Using percentages}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid4132756\charrsid5316830 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid5397547 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid4132756\charrsid4132756 \par }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid5397547\charrsid9323870 Scope}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid5397547\charrsid9323870 : }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid9323870\charrsid9323870 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid9323870 \par Students need to be able to:}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid5397547 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684 \par {\listtext\pard\plain\ltrpar \rtlch \af3\afs22 \ltrch \f3\fs22\lang2057\langfe1033\langfenp1033\insrsid10899684 \loch\af3\dbch\af0\hich\f3 \'b7\tab}}\pard \ltrpar\ql \li0\ri0\widctlpar \tx567\jclisttab\tx1080\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\ls1\adjustright\rin0\lin0\itap0\pararsid10899684 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 calculate using a given formula,}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 \par {\listtext\pard\plain\ltrpar \rtlch \af3\afs22 \ltrch \f3\fs22\lang2057\langfe1033\langfenp1033\insrsid10899684 \loch\af3\dbch\af0\hich\f3 \'b7\tab}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 m}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 ake a reverse ca}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 lculation using a given formula,}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 \par {\listtext\pard\plain\ltrpar \rtlch \af3\afs22 \ltrch \f3\fs22\lang2057\langfe1033\langfenp1033\insrsid10899684 \loch\af3\dbch\af0\hich\f3 \'b7\tab}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 u}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 se negative numbers in formulae. \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid5397547 {\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid12607148 \par }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid5397547\charrsid9323870 What students need to know}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid5397547\charrsid9323870 : \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid9323870 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684 Formulae}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1380\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10899684 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 A formula is a rule which describes }{ \rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 how}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 to make a calculation}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 for specific quantities. For example, to work out the area of a rectangle, you multiply the length by the width. }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 A }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid15169025 formula}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 for this could look like: \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 A }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 =}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 lw}{ \rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 . The }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 l }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 stands for the length and the}{ \rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 stands for the width. }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 In a formula}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 ,}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 add (+) and subtract (\endash ) are shown normally. However}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 ,}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 if two things need to be multiplied, they}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 are written next to each other. This means that }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 lw}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 means }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 l}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 {\field{\*\fldinst SYMBOL 180 \\f "Symbol" \\s 11}{\fldrslt\f3\fs22}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 . Also, if two things need to }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 be divided, we write them like a fraction. So, }{\pard\plain \ltrpar\ql \li0\ri0\widctlpar \tx567\tx1134\tx1380\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10899684 \rtlch \af1\afs22\alang1025 \ltrch \f1\fs22\lang2057\langfe1033\cgrid\langnp2057\langfenp1033\insrsid10899684\charrsid15169025 {\object\objemb \objw279\objh620{\*\objclass Equation.3}{\*\objdata 01050000020000000b0000004571756174696f6e2e33000000000000000000000e0000 d0cf11e0a1b11ae1000000000000000000000000000000003e000300feff0900060000000000000000000000010000000100000000000000001000000200000001000000feffffff0000000000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff fffffffffffffffffdffffff04000000feffffff05000000fefffffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffff52006f006f007400200045006e00740072007900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016000500ffffffffffffffff0200000002ce020000000000c00000000000004600000000000000000000000010d6 5e2f8e78c40103000000000300000000000001004f006c00650000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000201ffffffffffffffffffffffff00000000000000000000000000000000000000000000000000000000 0000000000000000000000001400000000000000010043006f006d0070004f0062006a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000120002010100000004000000ffffffff0000000000000000000000000000000000000000000000000000 0000000000000000000001000000660000000000000003004f0062006a0049006e0066006f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000012000200ffffffffffffffffffffffff000000000000000000000000000000000000000000000000 000000000000000000000000030000000600000000000000feffffff02000000fefffffffeffffff05000000060000000700000008000000090000000a000000fefffffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff010000020800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100feff030a0000ffffffff02ce020000000000c0000000000000461700 00004d6963726f736f6674204571756174696f6e20332e30000c0000004453204571756174696f6e000b0000004571756174696f6e2e3300f439b271000000000000000000000000000000000000000000000000000000000000000000000000000000000300040000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000ffffffff030000000400000001000000ffffffff0000000000000000ec0100004604000076010000010009000003bb00000003001c00000000000500000009020000000005000000020101000000050000000102ffffff000500 00002e0118000000050000000b0200000000050000000c02e003c0011200000026060f001a00ffffffff000010000000c0ffffffb8ffffff80010000980300000b00000026060f000c004d617468547970650000c00008000000fa0200001000000000000000040000002d01000005000000140200024000050000001302 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0000000070bb15006cf514000000000003010103010a01030e00000112836c0000011283770000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001050000050000000d0000004d45544146494c455049435400ec010000bafbffff7e0100000800ec0146040000 010009000003bb00000003001c00000000000500000009020000000005000000020101000000050000000102ffffff00050000002e0118000000050000000b0200000000050000000c02e003c0011200000026060f001a00ffffffff000010000000c0ffffffb8ffffff80010000980300000b00000026060f000c004d61 7468547970650000c00008000000fa0200001000000000000000040000002d0100000500000014020002400005000000130200026a011c000000fb0280fe0000000000009001010000000402001054696d6573204e657720526f6d616e00b7c5c777c0c5c77720c0ca7700003000040000002d01010008000000320a8c03 600001000000777908000000320a6e019300010000006c790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000bc02000000000102022253797374656d000000000a0021008a0100000000fffffffff4f31200b9c1c777040000002d01020004000000f0010100030000000000}{\result { \rtlch \af1\afs22 \ltrch \f1\fs22\dn24\insrsid3685437\charrsid15169025 {\pict{\*\picprop\shplid1025{\sp{\sn shapeType}{\sv 75}}{\sp{\sn fFlipH}{\sv 0}}{\sp{\sn fFlipV}{\sv 0}}{\sp{\sn pictureGray}{\sv 0}}{\sp{\sn pictureBiLevel}{\sv 0}} {\sp{\sn fFilled}{\sv 0}}{\sp{\sn fHitTestFill}{\sv 1}}{\sp{\sn fillShape}{\sv 1}}{\sp{\sn fillUseRect}{\sv 0}}{\sp{\sn fNoFillHitTest}{\sv 0}}{\sp{\sn fLine}{\sv 0}} {\sp{\sn fLayoutInCell}{\sv 1}}{\sp{\sn fReallyHidden}{\sv 0}}{\sp{\sn fScriptAnchor}{\sv 0}}{\sp{\sn fLayoutInCell}{\sv 1}}}\picscalex100\picscaley100\piccropl0\piccropr0\piccropt0\piccropb0 \picw492\pich1094\picwgoal279\pichgoal620\wmetafile8\bliptag-802552855\blipupi2306{\*\blipuid d02a03e9fc37b4202fd686a792d9b6f1}010009000003bb00000003001c00000000000500000009020000000005000000020101000000050000000102ffffff00050000002e0118000000050000000b02 00000000050000000c02e003c0011200000026060f001a00ffffffff000010000000c0ffffffb8ffffff80010000980300000b00000026060f000c004d617468 547970650000c00008000000fa0200001000000000000000040000002d0100000500000014020002400005000000130200026a011c000000fb0280fe00000000 00009001010000000402001054696d6573204e657720526f6d616e00b7c5c777c0c5c77720c0ca7700003000040000002d01010008000000320a8c0360000100 0000777908000000320a6e019300010000006c790a00000026060f000a00ffffffff0100000000001c000000fb021000070000000000bc02000000000102022253797374656d000000000a0021008a0100000000fffffffff4f31200b9c1c777040000002d01020004000000f0010100030000000000}}}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 means }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 l}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 {\field{\*\fldinst SYMBOL 184 \\f "Symbol" \\s 11}{\fldrslt\f3\fs22}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 . (You should read this as \'93}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 l}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 over }{ \rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid15169025 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid15169025 \'94).}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par \par \par \par \par \par \par \par \par \par \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid16062733 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684 Calculate using a given formula}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par Using a basic formula, you just replace the letters with the numbers given. \par \par }\trowd \irow0\irowband0\lastrow \ltrrow\ts23\trgaph108\trleft-108\trbrdrt\brdrdb\brdrw10 \trbrdrl\brdrdb\brdrw10 \trbrdrb\brdrdb\brdrw10 \trbrdrr\brdrdb\brdrw10 \trbrdrh\brdrdb\brdrw10 \trbrdrv\brdrdb\brdrw10 \trftsWidth1\trftsWidthB3\trftsWidthA3\trautofit1\trpaddl108\trpaddr108\trpaddfl3\trpaddft3\trpaddfb3\trpaddfr3\tbllkhdrrows\tbllklastrow\tbllkhdrcols\tbllklastcol \clvertalt\clbrdrt\brdrdb\brdrw10 \clbrdrl\brdrdb\brdrw10 \clbrdrb\brdrdb\brdrw10 \clbrdrr \brdrdb\brdrw10 \cltxlrtb\clftsWidth3\clwWidth9288\clshdrawnil \cellx9180\pard\plain \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid16218458\yts23 \rtlch \af36\afs24\alang1025 \ltrch \f36\fs24\lang2057\langfe1033\cgrid\langnp2057\langfenp1033 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684 Example Question:}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid8785155 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid10899684\yts23 {\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 A painter is using a rule of thumb for working out the cost of painting a room. The formula used is: }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 C\~=\~2.4(l + w) +\~8}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 .}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684 \par \par }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 C}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 is the cost in}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 \'a3}{ \rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 l }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 w}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 are the}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 length}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 width}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 of the room in metres.}{ \rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 \par What would be the cost for a room }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 3.5m}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 wide and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10098440 4.5}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440 m}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10899684\charrsid10899684 long? \par \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid16218458\yts23 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684 Solution:}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid8785155 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid10899684\yts23 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 The information tells us that }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 l}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 = 4.5}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 w}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 = 3.5}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 .}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 \par The formula is }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 C = 2.4(}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 l}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 + } {\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 w}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 ) + 8}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 Replace}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 l}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 with }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 4.5}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10899684\charrsid10899684 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 with }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid15038584 3}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10899684\charrsid10899684 .5}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 in the formula.}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 \par We }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 have: \par C = 2.4(4.5 + 3.5) + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 8}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 So, \par C = 2.4 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 {\field{\*\fldinst SYMBOL 180 \\f "Symbol" \\s 11}{\fldrslt\f3\fs22}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 8}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 8 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 C = 19.2}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 8 \par C}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 = }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 27.20}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10899684 \par That is}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 : \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\ul\insrsid15038584 C = \'a327.2}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\ul\insrsid10899684\charrsid10098440 0 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid16218458\yts23 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \cell }\pard\plain \ltrpar \ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0 \rtlch \af36\afs24\alang1025 \ltrch \f36\fs24\lang2057\langfe1033\cgrid\langnp2057\langfenp1033 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \trowd \irow0\irowband0\lastrow \ltrrow\ts23\trgaph108\trleft-108\trbrdrt\brdrdb\brdrw10 \trbrdrl\brdrdb\brdrw10 \trbrdrb\brdrdb\brdrw10 \trbrdrr\brdrdb\brdrw10 \trbrdrh\brdrdb\brdrw10 \trbrdrv\brdrdb\brdrw10 \trftsWidth1\trftsWidthB3\trftsWidthA3\trautofit1\trpaddl108\trpaddr108\trpaddfl3\trpaddft3\trpaddfb3\trpaddfr3\tbllkhdrrows\tbllklastrow\tbllkhdrcols\tbllklastcol \clvertalt\clbrdrt\brdrdb\brdrw10 \clbrdrl\brdrdb\brdrw10 \clbrdrb\brdrdb\brdrw10 \clbrdrr \brdrdb\brdrw10 \cltxlrtb\clftsWidth3\clwWidth9288\clshdrawnil \cellx9180\row }\pard \ltrpar\ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10899684 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1380\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10899684 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par \par }\pard \ltrpar\ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10098440 {\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10098440 Make a reverse calculation using a given formula \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10098440 Sometimes the quantity at the beginning of the formula needs to be worked out. That means reversing the calculation. }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1380\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10098440 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }\pard\plain \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid16218458\yts23 \rtlch \af36\afs24\alang1025 \ltrch \f36\fs24\lang2057\langfe1033\cgrid\langnp2057\langfenp1033 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 Example Question:}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid8785155 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 The same painter has told a client that a room}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid15038584 that is }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid15038584 6m}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid15038584 long}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 will cost }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440 \'a330}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 to pain} {\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid15038584 t}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 . How wide would the room be?}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 The formula used is}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 still}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 : }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 C}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440 = }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 2.4(l + w) }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440 + }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 8}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 .}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid10098440\yts23 {\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 C}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 is the cost in}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 \'a3}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 l }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 are the}{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 length}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 width}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10899684 of the room in metres.}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid16218458\yts23 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 Solution:}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10899684 The information tells us that }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10098440 C }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10899684 = }{ \rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 30}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10899684 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440 l}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10899684 = }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 6}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10899684 .}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par \par Using the formula, replace }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 C}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 with }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 30}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 and }{\rtlch \ab\ai\af1\afs22 \ltrch \b\i\f1\fs22\insrsid10098440\charrsid10098440 l}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 with }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 6}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 .} {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par We have: \par 30 = }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4(6 + }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 ) + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 8 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par So: \par \par }\pard \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0\pararsid10098440\yts23 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 30 = 2.4 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 {\field{\*\fldinst SYMBOL 180 \\f "Symbol" \\s 11}{\fldrslt\f3\fs22}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 6 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 8 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 30 = 14.4}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 8 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 30 = 22.4}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 + }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 30 \endash 22.4}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 = }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 7.6}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 = }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4}{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 = 7.6}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 {\field{\*\fldinst SYMBOL 184 \\f "Symbol" \\s 11}{\fldrslt\f3\fs22}}}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 2.4 \par }{\rtlch \ai\af1\afs22 \ltrch \i\f1\fs22\insrsid10098440\charrsid10098440 w}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 = }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid15038584 3.17}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 (using a calculator) \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440\charrsid10098440 That is:}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\ul\insrsid15038584 w = 3.2}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\ul\insrsid10098440\charrsid10098440 m (to 1 decimal place)}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \cell }\pard\plain \ltrpar\ql \li0\ri0\widctlpar\intbl\aspalpha\aspnum\faauto\adjustright\rin0\lin0 \rtlch \af36\afs24\alang1025 \ltrch \f36\fs24\lang2057\langfe1033\cgrid\langnp2057\langfenp1033 { \rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \trowd \irow0\irowband0\lastrow \ltrrow\ts23\trgaph108\trleft-108\trbrdrt\brdrdb\brdrw10 \trbrdrl\brdrdb\brdrw10 \trbrdrb\brdrdb\brdrw10 \trbrdrr\brdrdb\brdrw10 \trbrdrh\brdrdb\brdrw10 \trbrdrv \brdrdb\brdrw10 \trftsWidth1\trftsWidthB3\trftsWidthA3\trautofit1\trpaddl108\trpaddr108\trpaddfl3\trpaddft3\trpaddfb3\trpaddfr3\tbllkhdrrows\tbllklastrow\tbllkhdrcols\tbllklastcol \clvertalt\clbrdrt\brdrdb\brdrw10 \clbrdrl\brdrdb\brdrw10 \clbrdrb \brdrdb\brdrw10 \clbrdrr\brdrdb\brdrw10 \cltxlrtb\clftsWidth3\clwWidth9288\clshdrawnil \cellx9180\row }\pard \ltrpar\ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid10098440 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par \par }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440 Using negative numbers in formulae}{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid10098440\charrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10098440 \par }{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10098440 Sometimes negative numbers are used in formulae. It is important to be clear with the negative sign (smaller than a \lquote minus\rquote and raised a little). Then the normal rules for arithmetic using negative numbers should be used (}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid16062733 For further information, refer to }{\rtlch \ab\af1\afs22 \ltrch \b\f1\fs22\insrsid16062733 Interpreting Information, Section I3}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid16062733 .)}{\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684\charrsid10098440 \par }\pard \ltrpar\ql \li0\ri0\widctlpar\tx567\tx1134\tx1701\tx2268\tx2835\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid5397547 {\rtlch \af1\afs22 \ltrch \f1\fs22\insrsid10899684 \par \par \par }}