Page 140 - Maths Class 05

Hours Minutes Seconds
45 seconds – 15 seconds 14 60 min. 108
15 48 4 5
= 30 seconds
– 5 51 15
Step 3 : Subtract minutes column.
9 hrs. 57 min. 0 sec.3
48 minutes – 51 minutes

48 < 51, so we cannot subtract.

We take 1 hour from hours column. We know that,

1 hour = 60 minutes
So, now add 60 minutes to 48 minutes.

We get, 108 minutes – 51 minutes = 57 minutes

Step 4 : Subtract hours column.

15 hours – 5 hours
But we have taken 1 hour in minutes column.

14 hours – 5 hours = 9 hours

We get, 9 hours 57 minutes 30 seconds.

Practice - 7.3
Practice - 7.3
Practice - 7.3
Practice - 7.3
1. Fill in the missing entries in the table given below.
Starting time Duration Finishing time

a. 2:25 p.m. 4:30 p.m.

b. 1:45 p.m. 3 hour 30 minutes

c. 2 hour 25 minutes 1600 hours

d. 5 hour 20 minutes 4:45 p.m.

e. 5:05 a.m. 7 hour 55 minutes

2. Subtract the following.
a. 5 hours 40 seconds from 7 hours 30 seconds

b. 42 minutes 10 seconds from 50 minutes 20 seconds
c. 4 hours 16 minutes from 8 hours 38 minutes

d. 4 hours 40 minutes from 6 hours 55 minutes
3. Subtract columnwise.

a. 13 min – 5 min 45 sec b. 9 hr 45 min – 3 hr 20 min
c. 2 hr 20 min 25 sec – 1 hr 5 min 20 sec d. 8 hr 18 min 20 sec – 4 hr 20 min 30 sec

Mathematics-5 140