Page 64 - Mathematics_Std_4

km m 3. Subtract kilometres:
11 1200 −11 km = 4 km 7 km. Write 7 in the

− 4 950 km column.
7 250
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Therefore, the answer is 7 km 250 m.

Example 3

km m sm

10 160 55
− 4 580 76

Solution Steps
1. Subtract centimetres:
km m cm 55 cm − 76 cm,it is not sufficient.
10 159 155 Take 1 m from 160 m and convert

− 4 580 76 it to get 100 cm. Add centimetres;
79 +100 cm = 55 cm 155 cm.

Now, subtract cm:
− 155 cm 76 cm = 79 cm. Write 79 in
the cm column. Remember that 159
m remained in the m column

km m cm 2. Subtract metres: 159 m − 580 m, it is
9 1159 155 not sufficient. Take 1km from 10 km

− 4 580 76 and convert it into 1000 m. Add
579 79 metres: 1000 m + = 159 m 1159 m.
Now, subtract metres:
− 1159 m = 580 m 579 m. Write

579 in the m column. Remember that
9 km remained in the km column.

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MATHEMATICS STD 4 PB 2024.indd 57