Higher Maths revision 0.0 / 5 MathematicsNumberGCSEAQA Created by: ElcaCreated on: 10-06-15 22:32 Estimating answers to number calculations 20.59 x 4.38 / 0.47 = 20 x 4 / 0.5 = 80 / 0.5 80 x 2 = 160 2.9 + 3.2 = 3 + 3 = 6 0.2 x 5.4 = 1 20.4 x 7.7 / 5.2 = 20 x 8 / 5 = 160 / 5 = 32 1 of 3 Maximum and minimum values £53 to the nearest pound minimum = £52.50 maximum = £53.50 10cm to the nearest cm minimum = 9.5cm maximum = 10.5cm 15.8mm to the nearest mm minimum = 15.75mm maximum = 15.85mm 2 of 3 Solving harder equations Equation containing a bracket 8 - 2 (z + 3) = 5 - 3z 8 - 2z - 6 = 5 - 3z 2 + z = 5 z = 3 Equation containing a fraction 2p / 3 = 7 - p / 2 2p = 21 - 3p / 2 7p = 42 p = 42 / 7 p = 6 3 of 3

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