Convert measurements of length: practice converting millimeters, centimeters, and meters with this educational worksheet.

Let's solve the worksheet step by step. The task is to convert lengths between millimetres (mm), centimetres (cm), and metres (m).

We are given the key conversions:
- 10 mm = 1 cm
- 100 cm = 1 m

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Part 1: Convert millimetres to centimetres

To convert mm → cm, divide by 10.

1. 20 mm
$ 20 \div 10 = 2 $ cm
✔ 2 cm

2. 50 mm
$ 50 \div 10 = 5 $ cm
✔ 5 cm

3. 70 mm
$ 70 \div 10 = 7 $ cm
✔ 7 cm

4. 55 mm
$ 55 \div 10 = 5.5 $ cm
✔ 5.5 cm

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Part 2: Convert centimetres to millimetres

To convert cm → mm, multiply by 10.

5. 2 cm
$ 2 \times 10 = 20 $ mm
✔ 20 mm

6. 7 cm
$ 7 \times 10 = 70 $ mm
✔ 70 mm

7. 3.5 cm
$ 3.5 \times 10 = 35 $ mm
✔ 35 mm

8. 6.5 cm
$ 6.5 \times 10 = 65 $ mm
✔ 65 mm

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Part 3: Convert centimetres to metres

To convert cm → m, divide by 100.

9. 200 cm
$ 200 \div 100 = 2 $ m
✔ 2 m

10. 700 cm
$ 700 \div 100 = 7 $ m
✔ 7 m

11. 375 cm
$ 375 \div 100 = 3.75 $ m
✔ 3.75 m

12. 450 cm
$ 450 \div 100 = 4.5 $ m
✔ 4.5 m

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✔ Final Answers:

| Question | Answer |
|--------|--------|
| 1. 20 mm | 2 cm |
| 2. 50 mm | 5 cm |
| 3. 70 mm | 7 cm |
| 4. 55 mm | 5.5 cm |
| 5. 2 cm | 20 mm |
| 6. 7 cm | 70 mm |
| 7. 3.5 cm | 35 mm |
| 8. 6.5 cm | 65 mm |
| 9. 200 cm | 2 m |
| 10. 700 cm | 7 m |
| 11. 375 cm | 3.75 m |
| 12. 450 cm | 4.5 m |

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🔍 Explanation Summary:

- mm → cm: Divide by 10
- cm → mm: Multiply by 10
- cm → m: Divide by 100

These are all based on metric system prefixes:
- milli- = 1/1000 → so 1 mm = 0.001 m
- centi- = 1/100 → so 1 cm = 0.01 m

So:
- 10 mm = 1 cm
- 100 cm = 1 m

This makes conversion straightforward using multiplication or division by 10 or 100.

Let me know if you'd like a printable version or help with more problems! 😊