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\\September 30, 2025 9:51 AM Bharat Arora P-9 Reader _________________________ Date: ___________________74

Solution: (a) m cm mm (b) km m cm

17 11 9 10 11 9
7 1 15 2 10 0 1 10 15

1 8 2 5 9 3 0 1 2 0 5 0
– 9 7 6 4 – 1 6 2 4 5 9 0
8 4 9 5 1 3 8 7 4 6 0

Thus, 18 m 25 cm 9 mm – 9 m Thus, 30 km 120 m 50 cm – 16 km
76 cm 4 mm = 8 m 49 cm 5 mm. 245 m 90 cm = 13 km 874 m 60 cm.

example 3: Rohan travelled 218 km 352 m by car and 414 km 165 m by bus. Find
the total distance travelled by Rohan.
Solution: km m

1 1
Distance travelled by car = 2 1 8 3 5 2
Distance travelled by bus = + 4 1 4 1 6 5

Total distance travelled = 6 3 2 5 1 7
Thus, Rohan travelled 632 km 517 m in all.

example 4: A tree was 21 m 75 cm high. A part measuring 12 m 24 cm from the top
broke off due to a storm. How much of the tree is still standing erect?
Solution:
m cm
1 11
Height of the tree before breaking = 2 1 7 5
Height of the broken part of the tree = – 1 2 2 4

Height of the remaining part of the tree = 9 5 1
Thus, 9 m 51 cm of the tree is still standing erect.

Think Tank Critical Thinking
What is the difference between the distances of your school and your father's
office from home?

Practice time 9B

1. Add the following:
(a) km m cm (b) m cm mm (c) km m cm mm

2 4 1 7 5 4 2 2 1 3 3 8 6 1 8 2 1 8 4 3 2
1 3 1 0 4 5 3 1 4 1 4 3 5 2 4 1 4 8 3 7 5

+ 0 5 0 8 1 0 9 + 1 2 0 9 1 7 + 3 4 2 3 3 7 2 2

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