Mathematics
Grade-1
Easy
Question
The sum of 
- 12 + 15 = 27
- 13 + 15 = 28
- 14 + 15 = 29
- 14 + 14 = 28
The correct answer is: 14 + 15 = 29
The sum of given model is 1ten 4 0nes +1 ten 5 ones
1ten + 1ten = 20; 4ones + 5 ones = 9 ones
20 + 9 = 29
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