Mathematics
Grade-2
Easy
Question
In which of the following do you have to regroup to find the sum?
- 28 + 37 = 65
- 51 + 26 = 77
- 36 + 43 = 79
- 20 + 55 = 75
The correct answer is: 28 + 37 = 65
The sum of 28 and 37 can be written as 28 + 37 =( 10+10+8) + (10+10+10+7)
=10+10+10+10+10+(8+7)
=10+10+10+10+10+15
(Re-grouping 15 as 15=10+5)
=10+10+10+10+10+10+5
=65
Correct choice is 1.
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