Length: meters and centimeters
One meter is 100 centimeters, so 4 m = 400 cm, and 72 cm needs 28 cm more to make 1 m. Children add and compare lengths and practice converting between the two units.
How to solve this
- Length is measured with a ruler; the main units are centimetres (cm) and metres (m), with 100 cm in 1 m.
- Always align the zero mark of the ruler with the start of the object before reading the length.
- Check by estimating first: a fingernail is about 1 cm, a door is about 2 m — does your answer fit?
Examples
35 cm + 20 cm = ?
55 cm
1 m = ?
100 cm
Practice problems with answers
Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.
- 500 cm = ___ m
- 5 cm + 72 cm = ___ cm
- 19 cm + ___ cm = 1 m
- 43 cm + ___ cm = 1 m
- 46 cm + ___ cm = 1 m
- 200 cm = ___ m
- 88 cm + ___ cm = 1 m
- 5 m = ___ cm
Show answers
- 5 m
- 77 cm
- 81 cm
- 57 cm
- 54 cm
- 2 m
- 12 cm
- 500 cm