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 Convert 3 m to centimetres.
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3 × 100 = 300 cm.
2 Convert 50 mm to centimetres.
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50 ÷ 10 = 5 cm.
3 Convert 4 km to metres.
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4 × 1000 = 4000 m.
Level 2 · Core
4 Convert 3.2 m to centimetres.
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3.2 × 100 = 320 cm.
5 Convert 2.5 km to metres.
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2.5 × 1000 = 2500 m.
6 Convert 750 cm to metres.
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750 ÷ 100 = 7.5 m.
Level 3 · Challenge
7 Convert 0.5 km to centimetres.
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0.5 × 1000 = 500 m, then 500 × 100 = 50000 cm.
8 Find the perimeter of a rectangle 1 m by 30 cm, in centimetres.
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1 m = 100 cm → 100 + 30 + 100 + 30 = 260 cm.
9 A rectangle is 2 m by 45 cm. Find its perimeter in centimetres.
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2(200 + 45) = 2 × 245 = 490 cm (which is 4.9 m).