State the Relationship between Units of Length
1 cm = 10 mm
2 cm = 20 mm
As we can see...
3 m = 300 cm
Therefore, 1 cm = 10 mm
1 m = 100 cm
- To convert length from a larger unit into a smaller unit, multiply by the relevant power of 10.
- To convert length from a smaller unit into a larger unit, divide by the relevant power of 10.
Convert Units of Length
Convert millimeters to centimeters
Example 1:
80 mm = _____ cm
80 mm = 80 mm ÷ 10 mm
= 8 cm
Example 2:
130 mm = _____ cm
130 mm = 130 mm ÷ 10 mm
= 13 cm
Convert centimeters to millimeters
Example 1:
55 cm = _____ mm
55 cm = 55 x 10 mm
= 550 mm
Example 2:
7.8 cm = _____ mm
7.8 cm = 7.8 x 10 mm
= 78 mm
Convert centimeters to meters
Example 1:
69 cm = _____ m
69 cm = 69 cm ÷ 100 cm
= 0.69 m
Example 2:
898 cm = _____ m
898 cm = 898 cm ÷ 100 cm
= 8.98 m
Convert meters to centimeters
Example 1:
5.2 m = _____ cm
5.2 m = 5.2 x 100 cm
= 520 cm
Example 2:
7.02 m = _____ cm
7.02 m = 7.02 x 100 cm
= 702 cm
Convert centimeters and millimeters to centimeters
Example 2:
Convert centimeters and millimeters to millimeters
Example 1:
6 cm 8 mm = _____ mm
6 cm 8 mm = (6 x 10 mm) + 8 mm
= 60 mm + 8 mm
= 68 mm
= 68 mm
Example 2:
23 cm 5 mm = _____ mm
23 cm 5 mm = (23 x 10 mm) + 5 mm
= 230 mm + 5 mm
= 235 mm
= 235 mm
Convert centimeters and millimeters to centimeters
Example 1:
6 cm 8 mm = _____ cm
6 cm 8 mm = 6 cm + (8 mm ÷ 10 mm)
= 6 cm + 0.8 cm
= 6.8 cm
= 6.8 cm
Example 2:
23 cm 5 mm = _____ cm
23 cm 5 mm = 23 cm + (5 mm ÷ 10 mm)
= 23 cm + 0.5 cm
= 23.5 cm
= 23.5 cm
Convert meters and centimeters to centimeters
Example 1:
7 m 69 cm = _____ cm
7 m 69 cm = (7 x 100 cm) + 69 cm
= 700 cm + 69 cm
= 769 cm
= 769 cm
Example 2:
30 m 17 cm = _____ cm
30 m 17 cm = (30 x 100 cm) + 17 cm
= 3000 cm + 17 cm
= 3017 cm
= 3017 cm
Convert meters and centimeters to meters
Example 1:
7 m 69 cm = _____ m
7 m 69 cm = 7 m + (69 cm ÷ 100 cm)
= 7 m + 0.69 m
= 7.69 m
= 7.69 m
Example 2:
30 m 17 cm = _____ m
30 m 17 cm = 30 m + (17 cm ÷ 100 cm)
= 30 m + 0.17 m
= 30.17 m
= 30.17 m