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. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 What is 4.6 × 10?
Show worked solution
4 ones → 4 tens, 6 tenths → 6 ones: 46.
2 Work out 2.5 × 100 and 2.5 × 1000.
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2.5 × 100 = 250; 2.5 × 1000 = 2 500.
3 What is 83 ÷ 10?
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8 tens → 8 ones, 3 ones → 3 tenths: 8.3.
Level 2 · Core
4 What is 0.08 × 1000?
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The 8 moves from the hundredths to the tens, with a 0 in the ones: 80.
5 Convert 4.5 m to centimetres and to millimetres.
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4.5 × 100 = 450 cm; 450 × 10 = 4 500 mm.
6 How many metres is 1 500 cm?
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1 500 ÷ 100 = 15 m.
Level 3 · Challenge
7 Kim divided 342 by a number and got 34.2.1 Kim divided by 10.
2 342 ÷ 100 = 3.42.
3 34.2 × 100 = 342.
Which statements are correct?
2 342 ÷ 100 = 3.42.
3 34.2 × 100 = 342.
Which statements are correct?
Show worked solution
One column → ÷ 10 (1 ✓). Two columns → 3.42 (2 ✓). 34.2 × 100 = 3 420, not 342 (3 ✗). 1 and 2.
8 Work out 3.6 ÷ 100 and 0.036 × 1000.
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3.6 ÷ 100 = 0.036. 0.036 × 1000 = 36.
9 A number multiplied by 100 gives 4 070. What is the number?
Show worked solution
4 070 ÷ 100 = 40.7.