GCSE · Rounding & bounds

Upper and lower boundsExam-style questions

Why a rounded value hides half a unit of uncertainty each way, why the upper bound is a strict "less than", how truncation differs, and how to pick the right bounds when calculating — the ÷ and − traps included.

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23 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAll Level 1 Level 2 Level 3 Level 4 Level 5

1
A bag of flour weighs $1.5$ kg to the nearest $0.1$ kg. Write down the error interval for the weight, $w$ kg.
Level 2 · 2 marksTry it
2
A number is $40$ to the nearest $10$ . Write down the largest and smallest values it could be, using inequalities.
Level 2 · 2 marksTry it