Mathematics
Grade-2
Easy
Question
In which of the following do you have to regroup to find the sum?
- 42 + 12 = 54
- 43 + 16 = 59
- 33 + 11 = 44
- 29 + 25 = 54
Hint:
In which the sum of one digit becomes two digit.
The correct answer is: 29 + 25 = 54
29 + 25 = 2 tens & 9 ones + 2 tens & 5 ones=10+10+9+10+10+5=10+10+10+10+(9+5)=10+10+10+10+14=10+10+10+10+(10+4)(Re-grouping 14 as 14=10+4)
= 5 tens & 4 ones=54
Correct choice is 4.
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