Converting between metres and centimetres | Maths | Quizalize & Oak National Academy

Starter quiz

Which unit would you use to measure the length of a whale?

mm

cm

m ✓

kg
Which unit would you use to measure the length of a book?

mm

cm ✓

m

kg
What is the length of this toy car?

'5 cm' ✓
What is the length of this twig?

5 cm ✓

7 cm

12 cm
Starting with the tallest, place these measurements in order of height.

1

⇔

90 cm

2

⇔

80 cm

3

⇔

50 cm

4

⇔

20 cm

5

⇔

10 cm
What is the height of this pebble?

2 cm ✓

7 cm

9 cm

When we change the unit of measurement between metres and centimetres, but the value remains the same, it is known as ______

equivalent

converting ✓
If one metre is equal to 100 cm, how many cm are 3 metres equal to?

'300 cm' ✓
Convert the height of this giraffe from metres to centimetres.

5 cm

50 cm

500 cm ✓
Match the lengths to their equivalent length.

2 m

⇔

200 cm ✓

400 cm

⇔

4 m ✓

6 m

⇔

600 cm ✓

1 m 30 cm

⇔

130 cm ✓

250 cm

⇔

2 m 50 cm ✓

1 m 90 cm

⇔

190 cm ✓
Starting with the shortest, put these measurements in order of length.

1

⇔

1 m 10 cm

2

⇔

2 m 60 cm

3

⇔

430 cm

4

⇔

603 cm

5

⇔

6 m 30 cm

6

⇔

700 cm
A piece of ribbon is 4 m 90 cm long. 300 cm is cut away from the ribbon. What is the length of the ribbon now?

'1 m 90 cm' ✓

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Using the known fact that 100 cm are equivalent to 1 m can help us convert between cm and m.
Partitioning and using the relationship between 1 m and 100 cm can help us convert between cm, and m and cm.
It is always important to estimate so you know if your answer is near to the real value.

Some children may think that 300 cm is bigger than 3 m because 300 is a bigger number than 3.

1 m is equivalent to 100 cm. So 3 m is equivalent to 300 cm. 3 m and 300 cm are equal in length or height.

Equivalent - When something is equivalent, it is equal in value.
Convert - When we convert, we change the unit of measurement between metres and centimetres, but the value remains the same.