Maths

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  • Created by: Amy
  • Created on: 19-11-12 16:57
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  • Numbers and arithmetic
    • Rounding
      • Round up if 5 or more
      • When done to  s.f - start counting from the first non 0.
    • Bounds
      • Measurements are not exact
      • Usually upper bound  ± .5 (or .05...)
    • Multiplying and diving
    • Estimation
      • Standard form to approximate  sums with big numbers
      • Approximations to one s.f for normal sums
    • Fraction calculations
      • Need to have the same denominator
    • Fractions, decimals and percentages
      • If the only factors of the denominator are 2 and/or five, it won't be recurring
      • Fraction to decimal: numerator divided  by denominator
      • Fraction to percentage: numerator divided by denominator times 100

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