Which two signs should be interchanged to make the equation mathematically correct?
120 ÷ 15 + 60 − 4 × 2 = 135
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. ÷ and −.
Given equation: 120 ÷ 15 + 60 − 4 × 2 = 135
Option 1: ÷ and −
After interchanging the expression becomes:
= 120 - 15 + 60 ÷ 4 × 2 = 135
= 120 - 15 + 15 × 2
= 120 - 15 + 30
= 135 = 135
As we have found our answer, there is no need to check further options.
Hence, ÷ and − is the correct answer.