us how or is. We using . The are (mm), (cm), (m), and (km).
10 mm = 1 cm, 100 cm = 1 m, and 1,000 m = 1 km. To to , by 100. So 3 m = 300 cm.
To with a , the 0 at one end of the . the at the other end. If a from 0 to 14 cm, it is 14 cm .
🔗 Match each object to the most sensible unit to measure it.
The length of your finger
The height of a door
The distance from London to Manchester
The thickness of a coin
Your ( to , ) is about 15–20 cm. Use it as a when you don't have a .
between and . To cm to mm, by 10 (8 cm = 80 mm). To mm to cm, by 10 (50 mm = 5 cm). To m to cm, by 100.
| This much | Is the same as | Quick example |
|---|---|---|
| 10 mm | 1 cm | Width of a fingernail |
| 100 cm | 1 m | A guitar is about 1 m |
| 1000 m | 1 km | A 12-minute walk |
🃏 Flip a card to convert the length.
Tap each card to see the answer.
You can by them. For , 250 cm, 3 m, and 180 cm: to cm . 3 m = 300 cm. : 180 cm < 250 cm < 300 cm.
The for the is about 8.95 m — a under 9 . That is 895 cm!
🧩 Order these lengths from shortest to longest.
- 200 cm (= 2 m)
- 55 cm
- 1 m (= 100 cm)
- 5 cm
You can add and , as as the . If a is 120 cm and you cut off 45 cm, you have 120 − 45 = 75 cm . The is the around a : a with 5 cm has a of 5 + 5 + 5 + 5 = 20 cm.
🗂️ Sort each length into the correct group.
30 cm
250 cm
90 cm
3 m
✍️ Convert these lengths.
2 m = cm, and 5 km = m.
Quiz time! 📝
Measuring Length Quiz
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