Page 103 - Math Skill - 4

101

Let us learn through examples :

Let’s Attempt

Example 1: Add 45 km 233 m, 24 km 25 m and 33 km 504 m.

Solution: km m Thus, 45 km 233 m + 24 km 25 m + 33 km 504 m
1 1 = 102 km 762 m
4 5 2 3 3

2 4 0 2 5
+ 3 3 5 0 4
1 0 2 7 6 2

Example 2: Subtract 235 kg 50 g from 300 kg 175 g.

Solution: kg g Thus, 300 kg 175 g – 235 kg 50 g = 65 kg 125 g
2 9 10 So, the difference is 65 kg 125 g
3 0 0 1 7 5
– 2 3 5 0 5 0
6 5 1 2 5

Example 3: Add 322 L 273 mL, 489 L 92 mL and 32 L 204 mL.
Solution: L mL Thus, 322 L 273 mL + 489 L 92 mL + 32 L 204 mL

1 1 1 = 843 L 569 mL
3 2 2 2 7 3
4 8 9 0 9 2
+ 3 2 2 0 4
8 4 3 5 6 9

Exercise 7.4

1. Add the following.
(a) 350 L 29 mL + 478 L 870 mL (b) 29 m 70 cm + 17 m 20 cm + 26 m 35 cm
(c) 13 kg 850 g + 29 kg 200 g + 34 kg 750 g

2. Find the sum.
(a) 9 km 350 m, 18 km 240 m and 25 km 450 m
(b) 559 kg 240 g, 42 kg 49 g and 96 kg 500 g

(c) 19 L 220 mL and 29 L 255 mL
3. Subtract the following.

(a) 7 L 150 mL from 13 L 200 mL (b) 13 L 200 mL from 27 L 150 mL
(c) 28 kg 200 g from 41 kg 150 g (d) 13 kg 225 g from 26 kg 55 g
(e) 320 km 49 m from 780 km 328 m (f) 37 kg 200 g from 48 kg 25 g