How_To_Be_Good_At_Math
STATISTICS • CALCULATING PROBABILITY 299 Decimals and percentages Probabilities are most often written as fractions, but they ca ...
a b 300-301_Chapter_Six.indd 300 29/02/2016 16:39 ...
ALGEBRA In algebra, we replace numbers with letters or other symbols. This makes it easier to study numbers and the connections ...
Equations An equation is a mathematical statement that contains an equals sign. We can write equations using numbers, or with le ...
Add the numbers within the brackets, then multiply the answer by 5 ALGEBRA • EQUATIONS 303 20 = = (a + b) + c a + (b + c) a (b + ...
304 ALGEBRA •^ SOLVING EQUATIONS Solving equations An equation can be rearranged to find the value of an unknown number, or vari ...
ALGEBRA • SOLVING EQUATIONS 305 b + 25 = 46 Rearranging equations Finding the value of a variable is harder if the variable is m ...
306 ALGEBRA •^ FORMULAS AND SEQUENCES Formulas and sequences A sequence is a list of numbers that follows a pattern (see pages 1 ...
Formulas and sequences Simple sequences To find the formula for any sequence, we need to look at the pattern. Some sequences hav ...
308 ALGEBRA •^ FORMULAS Writing a formula A formula is like a recipe, except that in a formula we use signs and letters instead ...
ALGEBRA • FORMULAS 309 h w The volume is the amount of space within a 3D shape h Using a formula We use formulas in maths to fin ...
Glossary Glossary acute angle An angle that is less than 90 degrees. adjacent Next to each other, such as two angles or sides of ...
GLOSSARY 311 degree (symbol °) (1) A measure of the size of a turn or angle. A full turn is 360 degrees. (2) A unit on a tempera ...
312 GLOSSARY metric system A system of standard measuring units including the metre (for measuring length) and the kilogram (for ...
GLOSSARY 313 reflective symmetry A shape has reflective symmetry if you can draw a line through it to make two halves that are m ...
Index A abacus 78 absolute zero 186 acute angles 233 in triangles 241 addition (adding) 78–87 associative law 154 column 86–7 co ...
INDEX 315 dates 194–95 Roman numerals for 11 days 194, 195 decagon 218 decimal currency 198 decimal numbers 58–9 adding 62, 87 c ...
316 INDEX highest common factor 46 Hindu-Arabic numerals 10–11 honeycomb cells 218 horizon 205 horizontal lines 205, 206, 210 of ...
INDEX 317 ordering numbers 22–3 ordinal compass points 254 origin 248, 249 ounces 188, 191 P parallel lines 205, 208–09 parallel ...
318 INDEX square units 168, 169 squares 213, 216, 217 area 170 cubes and 225 perimeter 166, 309 nets of 228, 229 order of rotati ...
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