Length units
Practise mm, cm, dm, m, and km with conversions, comparisons, and short calculations.
How to solve this
- Use the metric ladder: 1 cm = 10 mm, 1 dm = 10 cm, 1 m = 100 cm, and 1 km = 1000 m.
- For comparisons, convert both lengths to the same unit before choosing <, >, or =.
- Mixed answers show the same amount in two units: 350 cm is 3 m 50 cm.
Examples
1 m = __ cm
100
4 km = __ m
4000
350 cm
3 m 50 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.
- 3 m + 8 m = ___ m
- 5 m = ___ cm
- 2 cm ___ 6 mm
- 1 dm ___ 1 cm
- 4 km = ___ m
- 2 dm + 8 dm = ___ dm
- 3 m = ___ cm
- 5 cm + 5 cm = ___ cm
Show answers
- 11 m
- 500
- >
- >
- 4 000
- 10 dm
- 300
- 10 cm