Page 157 - Mathematics_Std_4

Example 1

hours minutes
3 45
FOR ONLINE READING ONLY
+ 4 35

Steps Solution
1. Add minutes: 45 35 80. Convert 80 hours minutes
=
+
minutes into 1 hour and 20 minutes. +1
Write 20 in the column of minutes. 3 45

Take 1 hour to the column of hours. + 4 35
2. Add hours: + +=1 3 4 8. Write 8 in the 8 20

column of hours.

Therefore, the answer is 8 hours 20 minutes.

Example 2

hours minutes

4 32
+ 2 28

Steps Solution

=
1. Add minutes: 32 28 60. Convert 60 hours minutes
+
minutes into 1 hour and 00 minutes. +1
Write 00 in the minutes column. Take 4 32
1 hour to the column of hours. + 2 28

2. Add hours: ++ =1 4 2 7. Write 7 in the 7 00
hours column.

Therefore, the answer is 7 hours.

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06/11/2024 17:17:55
MATHEMATICS STD 4 PB 2024.indd 150
MATHEMATICS STD 4 PB 2024.indd 150 06/11/2024 17:17:55