meas y2 length

What you'll learn

1. 1

   We measure length in centimetres (cm) and metres (m). 100 cm makes 1 m.

2. 2

   Line the object up with the 0 on the ruler, not the end of the plastic. Then read the number at the other end.

3. 3

   How many centimetres are in 1 metre?

4. 4

   To compare lengths, both must be in the same unit first.

5. 5

   Which is longer, 2 m or 150 cm? 2 m is 200 cm. 200 is more than 150, so 2 m is longer.

6. 6

   Which is longer?

7. 7

   Why must you start measuring at 0 on the ruler?