Which two signs should be interchanged to make the equation mathematically correct?
48 + 36 - 81 × 9 ÷ 2 = 66
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. ÷ and ×
Given equation: 48 + 36 - 81 × 9 ÷ 2 = 66
Option 1: ÷ and ×
After interchanging the expression becomes:
= 48 + 36 - 81 ÷ 9 × 2 = 66
= 48 + 36 - 9 × 2
= 48 + 36 - 18
= 66 is equal to 66.
As we have found our answer, there is no need to check further options.
Hence, the correct answer is ÷ and ×.