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Question: Joe scored 43 in Economics, 31 in Science and 52 in Math. What is his total in all the three subjects?


A ) 115
B ) 126
C ) 95
D ) 136

Steps to derive

1 Total score = marks in Economics + marks in Science + marks in Maths.

2 = 43 + 31 + 52
 [Substitute the values.]

3 43 = 40 + 3
31 = 30 + 1
52 = 50 + 2
 [Break the numbers into tens and ones.]

4 = (40 + 30 + 50) + (3 + 1 + 2)
 [Add the tens and ones separately.]

5 = 120 + 6 = 126
 [Add the two sums.]

6 So, the total in all the three subjects is 126.



Hence the right answer is Option B

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