Printable · GCSE Foundation · ages 14-16

Exact calculation: fractions, surds and π worksheet — GCSE Foundation

Fifteen questions on "exact calculation: fractions, surds and π" — DfE statement N8. Print it, or print three versions so neighbours cannot copy by letter; the key gives the letter for each version.

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Exact calculation: fractions, surds and π worksheet — GCSE Foundation

Maths · GCSE Foundation · N8 · Exact calculation: fractions, surds and π · Non-calculator · 15 questions

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1.Work out 2/3 × 3/4 exactly, giving your answer in its simplest form.
(a)17/12
(b)1/2
(c)8/9
(d)2
2.A cake recipe needs 3/4 of a kilogram of sugar. Aisha wants to make half the recipe. Work out how much sugar she needs, giving your answer as a fraction of a kilogram in its simplest form.
(a)5/4
(b)3/4
(c)3/2
(d)3/8
3.A student works out the exact area of a circle with radius 4 cm by squaring the radius but forgetting to multiply by π. Work out the correct exact area of the circle, in terms of π.
(a)64π cm²
(b)4π cm²
(c)8π cm²
(d)16π cm²
4.A circle has a diameter of 10 cm. Work out the exact circumference of the circle, in terms of π.
(a)25π cm
(b)5π cm
(c)20π cm
(d)10π cm
5.Work out 4π + 2π, giving your answer as a multiple of π.
(a)6
(b)8π
(c)6π²
(d)6π
6.Work out 2/5 + 1/4, giving your answer in its simplest form.
(a)3/20
(b)13/40
(c)1/3
(d)13/20
7.3/5 of a 5/6 litre bottle of juice is poured out. Work out the exact volume poured out, in litres.
(a)1/2
(b)43/30
(c)18/25
(d)25/36
8.Work out 5/6 × 2/9, giving your answer in its simplest form.
(a)7/15
(b)5/27
(c)15/4
(d)5/3
9.Work out 1 1/2 ÷ 3/4 exactly, giving your answer in its simplest form.
(a)9/8
(b)2/3
(c)2
(d)1/2
10.A quarter-circle has a radius of 6 cm. Work out the exact perimeter of the quarter-circle, giving your answer in terms of π.
(a)(12 + 12π) cm
(b)3π cm
(c)(12 + 3π) cm
(d)(6 + 3π) cm
11.Work out 3/4 − 5/12 exactly, giving your answer in its simplest form.
(a)1/3
(b)−1/6
(c)1/4
(d)7/6
12.A circle has a radius of 3 cm. Which of these is the exact area of the circle?
(a)28.3 cm²
(b)28.26 cm²
(c)9π cm²
(d)27 cm²
13.Work out 3π − π, giving your answer as a multiple of π.
(a)2
(b)2π
(c)4π
(d)3
14.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.
(a)1 3/4
(b)2 5/12
(c)8
(d)1 7/12
15.Zoe worked out 3/8 + 1/8 by adding the numerators and the denominators, and got 4/16. Work out the correct value of 3/8 + 1/8, giving your answer in its simplest form.
(a)1/4
(b)3/8
(c)4/9
(d)1/2

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