Page 124 - Start Up Mathematics_3

Addition and Subtraction

Length

Example 11: Add 25 m 32 cm and Example 12: Subtract 117 m 54 cm from
16 m 8 cm. 183 m 21 cm.

Solution: m cm Solution: m cm
1 1 12 11
2 5 3 2 7 2 1 11
+ 1 6 0 8 1 8 3 2 1

4 1 4 0 – 1 1 7 5 4
6 5 6 7

Example 13: Add 125 km 350 m and Example 14: Subtract 9 km 150 m from
18 km 210 m. 15 km.

Solution: km m Solution: km m
1 14 11
1 2 5 3 5 0 0 4 10 10
+ 1 8 2 1 0 1 5 0 0 0
1 4 3 5 6 0 – 9 1 5 0
5 8 5 0

Weight

Example 15: Add 313 kg 150 g and Example 16: Subtract 15 kg 65 g from
225 kg 375 g. 36 kg 125 g.

Solution: kg g Solution: kg g

1 0 12
3 1 3 1 5 0 3 6 1 2 5
+ 2 2 5 3 7 5 – 1 5 6 5

5 3 8 5 2 5 2 1 0 6 0

Capacity

Example 17: Add 7 L 275 mL and Example 18: Subtract 26 L 350 mL from
582 L 130 mL. 274 L 125 mL.

Solution: L mL Solution: L mL
1 13 10
7 2 7 5 6 3 0 12
+ 5 8 2 1 3 0 2 7 4 1 2 5
5 8 9 4 0 5 – 2 6 3 5 0
2 4 7 7 7 5

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