Page 155 - Mathematics_Std_4

Addition of measurements of time without regrouping
Measurement of time with the same units can be added by
considering the relationships of their units.

FOR ONLINE READING ONLY
Example 1

hours minutes

2 25
+ 3 15

Steps Solution
1. Add minutes: 25 + =15 40. Write hours minutes

40 in the minutes column. 2 25
2. Add hours: +=2 3 5. Write 5 in the + 3 15

hours column. 5 40

Therefore, the answer is 5 hours 40 minutes.

Example 2

hours minutes
12 28

+ 4 19

Solution
hours minutes
12 28

+ 4 19

16 47

148

06/11/2024 17:17:54
MATHEMATICS STD 4 PB 2024.indd 148
MATHEMATICS STD 4 PB 2024.indd 148 06/11/2024 17:17:54