Page 175 - ICSE Math 5

Exercise 12.2

1. Add the following.

(a) 9 h 30 min and 6 h 25 min (b) 12 h 50 min and 8 h 46 min
(c) 7 h 18 min 25 s and 5 h 42 min 36 s (d) 13 h 9 min 53 s and 4 h 13 min 22 s

(e) 10 h 20 min 40 s and 11 h 35 min 28 s (f) 18 h 41 min 15 s and 21 h 30 min 52 s

2. Subtract the following.

(a) 7 h 13 min from 15 h 40 min (b) 5 h 32 min from 8 h 26 min

(c) 4 h 7 min 18 s from 12 h 15 min 35 s (d) 6 h 36 min 44 s from 14 h 22 min 32 s
(e) 13 h 40 min 37s from 20 h 9 min 15 s (f) 18 h 43 min 35 s from 31 h 23 min 27 s

3. Multiply the following.
(a) 2 h 17 min by 8 (b) 7 h 4 min by 11 (c) 6 h 18 min 5 s by 5

(d) 12 h 18 min 10 s by 9 (e) 9 h 22 min 13 s by 3 (f) 8 h 15 min 24 s by 7

4. Divide the following.
(a) 6 h 45 min 40 s by 2 (b) 17 h 40 min 20 s by 4 (c) 156 h 15 min 20 s by 5

(d) 111 h 37 min 30 s by 6 (e) 9 h 6 min 42 s by 3 (f) 20 h 35 min 4 s by 4

5. Solve the following word problems.

(a) On Sunday, Aditya plays cricket for 1 hour 30 minutes in the morning and
football for 45 minutes in the evening. For how many hours does Aditya play on
Sunday?
(b) Rashi attends school from 8:00 a.m. to 1:30 p.m. For how many hours does Rashi
attend the school?

(c) Mr Sharma takes 1 hour 10 minutes to reach his office daily. If he goes to office
6 days in a week, then how many hours does he spend going to his office in
4 weeks?
(d) A daily wage worker works for 7 hours 30 minutes in a day. For how many hours does
he work in a week?

(e) A bus takes 3 hours 40 minutes to reach city B from city A and 1 hour 55 minutes
to reach city C from City B. How much time does the bus take to reach city C from
city A?

(f) Anshuman studied 4 subjects from 6:30 p.m. to 8:30 p.m. He spent equal time to
study each subject. How much time did he spend studying? Also, find the time for
which he studied each subject.

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