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GCSE Mathematics Paper 1

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Different Words ADD Plus Total More than Sum of SUBTRACT Take away Minus Difference Less than

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MULTIPLY Times Lots of Product DIVIDE Share Divisible by 35 2 8 1 7 6 21 180 290 2 45 etc

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Area & Perimeter Add up edges Answer in cm Area = Length x width Answer in cm 2

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Area = HALF base x height ORBase x Height 2 Area of a Triangle Answer in cm 2

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Area Units 100cm 1 m 2 100cm so 1m 2 = 10000 cm 2

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Volume width height length Volume = length x width x height Units cm 3, m 3

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“Percent” = out of 100 Percent without a calculator Find 10% by DIVIDING by 10 Then5% half of 10% 30%3 lots of 10% etc

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Fraction of … ‘Divide by bottom and times by top’ 1 / 7 of … Divide amount by 7 3 / 7 of … Divide amount by 7 and times by 3

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DST D ST Distance Speed Time Be aware of units 2hrs 30 mins = 2.5 hours

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Ratios total = 10 450 ÷ 10 = 45 2 parts 2 x 45 = 90 etc Share £450 in ratio 2:3:5

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Interior Angles 180º 360º 540º Add a side... Add 180º

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Angles Exterior Angle of any shape add up to 360º

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Angles 180º same size

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Bearings Measured clockwise from north N Three figures e.g. 075º, 223º

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Averages Mean = sum of values total freq Medianmiddle value (write in order first) Mode most popular (Modal) Range biggest - smallest

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Algebra Key Words Solve what does x stand for? (must include = in sum) Factorise put INTO brackets

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Transformations En lar gem e n t Rotation Reflection Translation Use the tracing paper! Careful of points of movement

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Scatter Graphs x x x x x x x x x Correlation Positive Negative

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Frequency Polygon Plot at the MIDPOINT and FREQ Normal scale going up in 5’s, 10’s, 20’s etc NOT groups

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Grouped Frequency Diagram ‘Bar graph’ Normal scale Bars as wide as the group

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Probability Probability of two events i.e. two sixes on a pair of dice Prob event 1 x prob event 2 i.e. 1 / 6 x 1 / 6 = 1 / 36

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Probability Table of values Expected number of winners... Probability x number in Q

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Graphs y = -x y = x y = x 2

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Read every question carefully If you can do a question, Do it correctly! If struggling with a question, go onto the next and come back If time, check through each answer Good Luck

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