Example 8: Subtract the following

a. 381 km 673 m from 713 km 241 m.

So, 713 km 241 m – 381 km 673 m = 331 km 568 m

km

m

11

13

6

11

2

1

3

11

7

1

3

2

4

1

–

3

8

1

6

7

3

4

5

3

6

1

5

Add. Write the answers in your notebook.

a. 30 m 23 cm + 80 m 72 cm b. 237 km 450 m + 12 km 610 m

c. 145 kg 500 g + 145 kg 250 g + 755 g d. 14 995 m + 134 225 m + 760 m

Subtract. Write the answers in your notebook.

a. 119 m 30 cm – 62 m 10 cm b. 250 km 500 m – 70 km 467 m

c. 205 kg 150 g – 70 kg 780 g d. 38 200 m – 14 345 m

WORD PROBLEMS

Example 9: To reach an island, Jas travelled 9.52 km by a ship and 3 km 768 m by a boat. What is the total distance travelled by Jas?

Distance travelled by ship = 9.52 km

Distance travelled by boat = 3 km 768 m = 3.768 km

Total distance travelled = 9.52 km + 3.768 km = 13.288 km

So, Jas travelled a total distance of 13.288 km or 13 km 288 m.

Example 10: Amrita went for a picnic. The journey was 43 km long. After 27 km 750 m, the bus stopped for a short break. How much distance was still left?

Total distance of journey = 43 km

Distance covered = 27 km 750 m = 27.750 km

Distance left = 43 km – 27.750 km = 15.250 km

The distance left was 15.250 km or 15 km 250 m.

Example 11: A fruitseller is selling oranges, mangoes and apples. The oranges, mangoes and apples together weigh 36 kg 357 g. If the weight of the apples is 18 kg 387 g and the weight of the oranges is 14 kg 270 g, what is the weight of the mangoes? Find in kilograms.

9 . 5 2 0

+

3 . 7 6 8

13 . 2 8 8

1

15

16

4 3 . 0 0 0

–

2 7 . 7 5 0

1 5 . 2 5 0

3

12

9

10

b. 469 kg 780 g from 923 kg 395 g.

So, 923 kg 395 g – 469 kg 780 g = 453 kg 615 g = 453.615 kg

kg

g

8

11

12

13

9

2

3

9

5

–

4

6

9

7

8

0

4

5

3

6

1

5