Printable worksheet for practicing metric unit conversions between centimeters and millimeters.

Explanation:
To solve these problems, you need to know how centimeters (cm) and millimeters (mm) relate to each other.
1 centimeter (cm) equals 10 millimeters (mm).

This means:
- To convert cm to mm, multiply by 10.
- To convert mm to cm, divide by 10.

Let’s go through each problem step by step:

1 a. 9.4 cm = ? mm
Multiply 9.4 by 10:
9.4 × 10 = 94
So, 9.4 cm = 94 mm

1 b. 2.1 cm = ? mm
2.1 × 10 = 21
So, 2.1 cm = 21 mm

2 a. 1.2 cm = ? mm
1.2 × 10 = 12
So, 1.2 cm = 12 mm

2 b. 714 mm = ? cm
Divide 714 by 10:
714 ÷ 10 = 71.4
So, 714 mm = 71.4 cm

3 a. 22.9 cm = ? mm
22.9 × 10 = 229
So, 22.9 cm = 229 mm

3 b. 278 mm = ? cm
278 ÷ 10 = 27.8
So, 278 mm = 27.8 cm

4 a. 4.5 cm = ? mm
4.5 × 10 = 45
So, 4.5 cm = 45 mm

4 b. 49 mm = ? cm
49 ÷ 10 = 4.9
So, 49 mm = 4.9 cm

5 a. 0.1 cm = ? mm
0.1 × 10 = 1
So, 0.1 cm = 1 mm

5 b. 0.2 cm = ? mm
0.2 × 10 = 2
So, 0.2 cm = 2 mm

6 a. 648 mm = ? cm
648 ÷ 10 = 64.8
So, 648 mm = 64.8 cm

6 b. 0.5 cm = ? mm
0.5 × 10 = 5
So, 0.5 cm = 5 mm

7 a. 37 mm = ? cm
37 ÷ 10 = 3.7
So, 37 mm = 3.7 cm

7 b. 7 mm = ? cm
7 ÷ 10 = 0.7
So, 7 mm = 0.7 cm

8 a. 42.5 cm = ? mm
42.5 × 10 = 425
So, 42.5 cm = 425 mm

8 b. 743 mm = ? cm
743 ÷ 10 = 74.3
So, 743 mm = 74.3 cm

9 a. 26 mm = ? cm
26 ÷ 10 = 2.6
So, 26 mm = 2.6 cm

9 b. 0.3 cm = ? mm
0.3 × 10 = 3
So, 0.3 cm = 3 mm

10 a. 18 mm = ? cm
18 ÷ 10 = 1.8
So, 18 mm = 1.8 cm

10 b. 35 mm = ? cm
35 ÷ 10 = 3.5
So, 35 mm = 3.5 cm

Final Answer:
1 a. 94 mm
1 b. 21 mm
2 a. 12 mm
2 b. 71.4 cm
3 a. 229 mm
3 b. 27.8 cm
4 a. 45 mm
4 b. 4.9 cm
5 a. 1 mm
5 b. 2 mm
6 a. 64.8 cm
6 b. 5 mm
7 a. 3.7 cm
7 b. 0.7 cm
8 a. 425 mm
8 b. 74.3 cm
9 a. 2.6 cm
9 b. 3 mm
10 a. 1.8 cm
10 b. 3.5 cm