Length Conversion interactive worksheet - Free Printable

To solve these problems, we use the rule given in the green box:
1 centimeter (cm) = 10 millimeters (mm)

Here is how to do the conversions:
* From cm to mm: Multiply by 10. (Example: $5 \text{ cm} \times 10 = 50 \text{ mm}$)
* From mm to cm: Divide by 10. (Example: $50 \text{ mm} \div 10 = 5 \text{ cm}$)

Let's go through each problem step-by-step:

1 a. $10 \text{ cm}$ to mm: $10 \times 10 = 100$
1 b. $70 \text{ mm}$ to cm: $70 \div 10 = 7$

2 a. $24 \text{ cm}$ to mm: $24 \times 10 = 240$
2 b. $50 \text{ cm}$ to mm: $50 \times 10 = 500$

3 a. $80 \text{ mm}$ to cm: $80 \div 10 = 8$
3 b. $9 \text{ cm}$ to mm: $9 \times 10 = 90$

4 a. $7 \text{ cm}$ to mm: $7 \times 10 = 70$
4 b. $80 \text{ mm}$ to cm: $80 \div 10 = 8$

5 a. $40 \text{ mm}$ to cm: $40 \div 10 = 4$
5 b. $100 \text{ mm}$ to cm: $100 \div 10 = 10$

6 a. $20 \text{ cm}$ to mm: $20 \times 10 = 200$
6 b. $90 \text{ mm}$ to cm: $90 \div 10 = 9$

7 a. $600 \text{ mm}$ to cm: $600 \div 10 = 60$
7 b. $56 \text{ cm}$ to mm: $56 \times 10 = 560$

8 a. $72 \text{ cm}$ to mm: $72 \times 10 = 720$
8 b. $380 \text{ mm}$ to cm: $380 \div 10 = 38$

9 a. $550 \text{ mm}$ to cm: $550 \div 10 = 55$
9 b. $65 \text{ cm}$ to mm: $65 \times 10 = 650$

10 a. $78 \text{ cm}$ to mm: $78 \times 10 = 780$
10 b. $990 \text{ mm}$ to cm: $990 \div 10 = 99$

Final Answer:
1 a. 100 mm
1 b. 7 cm
2 a. 240 mm
2 b. 500 mm
3 a. 8 cm
3 b. 90 mm
4 a. 70 mm
4 b. 8 cm
5 a. 4 cm
5 b. 10 cm
6 a. 200 mm
6 b. 9 cm
7 a. 60 cm
7 b. 560 mm
8 a. 720 mm
8 b. 38 cm
9 a. 55 cm
9 b. 650 mm
10 a. 780 mm
10 b. 99 cm