Page 147 - Revised Maths Wisdom Class - 2

Measurements 145

Using Ruler to Measure the Length

We use a ruler to measure the length of small objects. The ruler in your geometry
box is 15 cm long. We always measure the length of an object by starting from the

'zero' (0) mark on the ruler. Now, look how the length of an object is measured
using a ruler.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm
inch
This pencil is 8 cm long. 2 3 4 5 6
1
0

Measure each object to the nearest centimetre and write their length in the box.

____ cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm
inch
0 1 2 3 4 5 6
____ cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm
inch
0 1 2 3 4 5 6
____ cm

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm
inch
0 1 2 3 4 5 6
Adding and Subtracting Lengths

To add and subtract lengths, we write length in
columns and then do addition and subtraction. 1 8 15
4 3 cm 9 5 cm

+ 1 7 cm – 6 8 cm
6 0 cm 2 7 cm