🧠 Grade 4 Math Quiz · Measurement
Millimetres Practice Questions
70 Grade 4 questions on Millimetres. Choose an answer to get instant feedback and a short explanation — the first 10 are free.
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Practice Questions
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How many millimetres are in 1 centimetre?
Explanation:
1 cm = 10 mm.
A pencil is 18 cm long. How many millimetres is that?
Explanation:
18 cm × 10 = 180 mm.
Which is longer? 45 mm or 5 cm?
Explanation:
5 cm = 50 mm, so 5 cm is longer.
The width of your eraser is 25 mm. How many centimetres is that?
Explanation:
25 mm = 2.5 cm (divide by 10).
Which object is about 1 millimetre thick?
Explanation:
A single sheet of paper is about 1 mm thick.
Convert 90 mm to centimetres.
Explanation:
90 mm ÷ 10 = 9 cm.
A paper clip is 35 mm long. Is this longer or shorter than 4 cm?
Explanation:
35 mm = 3.5 cm, which is shorter than 4 cm.
How many millimetres are in 12 cm?
Explanation:
12 cm × 10 = 120 mm.
Which is the shortest?
Explanation:
25 mm is the shortest (2.5 cm = 25 mm).
Your fingernail is about 10 mm wide. How many centimetres?
Explanation:
10 mm = 1 cm.
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