Number worksheet — GCSE Foundation

1.Postage on a parcel is calculated as £4.60, correct to the nearest 20p. Which of these could not be the actual cost of the postage?

2.Work out an estimate for 588 ÷ 31, by rounding each number to 1 significant figure.

3.Work out −7 − (−3).

4.Chloe wants to work out 3 1/4 − 1 2/3. She converts both mixed numbers to twelfths, then subtracts the whole numbers and the fraction parts separately, without checking whether she needs to exchange first. Work out the correct value of 3 1/4 − 1 2/3, giving your answer as a mixed number in its simplest form.

5.Work out 2/3 × 3/4 exactly, giving your answer in its simplest form.

6.Write the fraction 3/4 as a decimal.

7.Work out the value of √(16 + 9)

8.A paint mix is made from white paint and blue paint in the ratio 5 : 3. Priya uses 1.2 litres of blue paint and the matching amount of white paint. Work out the total volume of the mix.

9.Work out 20 − 8 ÷ 2 + 1

10.A spreadsheet shows that 812 − 397 = 315. Work out an estimate for 812 − 397, by rounding each number to the nearest 100, to check whether the spreadsheet's answer is reasonable.

11.Write 0.45 as a fraction in its simplest form.

12.Work out −6 × (−3).

13.A jug holds 1.25 litres of water. Ella pours in another 400 ml. Work out the total volume, in litres.

14.Write 60 as a product of its prime factors, using index notation.

15.Work out how many factors 36 has.