Page 185 - Start Up Mathematics_1

(c) cm

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

(d) cm

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

3 Fill in the boxes.

(a) 7 m = cm (b) m = 300 cm (c) m = 800 cm

(d) 5 m = cm (e) 12 m = cm (f) m = 900 cm

Addition and Subtraction of Length

Lengths are added and subtracted like any other numbers.

Let’s add 3 cm and 5 cm. cm
3 cm 5 cm 3

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

3 cm + 5 cm = 8 cm 8

Now look at the given examples.

1. Add 2 m 20 cm and 2. Subtract 3 m 40 cm from
4 m 50 cm. 7 m 60 cm.

m cm m cm

2 20 7 60

+ 4 50 – 3 40

6 70 4 20

Add centimetres first and Subtract centimetres first
then the metres. and then the metres.

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