Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown.
Level 1 · Warm-up
1 How many mm2 are there in 1 cm2?
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10 × 10 = 100 mm2.
2 Convert 5 cm2 to square millimetres. (number of mm2)
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5 × 100 = 500 mm2.
3 How many cm2 are there in 1 m2?
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100 × 100 = 10000 cm2.
Level 2 · Core
4 Convert 3 m2 to square centimetres. (number of cm2)
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3 × 10000 = 30000 cm2.
5 Convert 800 mm2 to square centimetres. (number of cm2)
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800 ÷ 100 = 8 cm2.
6 Convert 25000 cm2 to square metres. (number of m2)
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25000 ÷ 10000 = 2.5 m2.
Level 3 · Challenge
7 Convert 4.5 hectares to square metres. (number of m2)
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1 ha = 10000 m2, so 4.5 × 10000 = 45000 m2.
8 A sports field is 120 m by 75 m. Find its area in hectares. (number of ha)
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120 × 75 = 9000 m2, and 9000 ÷ 10000 = 0.9 ha.
9 A rectangle is 2 m by 50 cm. Find its area in square centimetres. (number of cm2)
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2 m = 200 cm, so 200 × 50 = 10000 cm2 (the same as 1 m2).