Mathematics 0580 · IGCSE · Estimation

Estimation — practice question

Sophie purchases 73 books for her school, and each book is priced at $21.95.
(a)[1]

By rounding each number to 1 significant figure, estimate the total cost of these books.

(b)[1]

Write down whether this estimate is greater than or less than the exact cost. Explain how you can tell, without calculating the exact cost.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$70\times20$ gives $1400$” …

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