Estimating (AQA GCSE Maths): Flashcards

Systematic approach to simplify numbers and make calculations easier, not wild guessing

Rounding skills

1 or 2 significant figures

Estimating has systematic method; guessing doesn't

$\pi \approx 3$

Find perfect squares on either side of the number

Determine which perfect square it's closer to

$\sqrt{87} \approx 9.3$ (between 9 and 10, closer to 9)

Show all working clearly, especially rounding steps

Manageable calculations while maintaining reasonable accuracy