Which two signs should be interchanged to make the equation mathematically correct?
64 − 16 × 25 ÷ 80 + 10 = 30
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 1 i.e. ÷ and -.
Given equation: 64 − 16 × 25 ÷ 80 + 10 = 30
Option 1: ÷ and -
After interchanging the expression becomes:
= 64 ÷ 16 × 25 - 80 - 10 = 30
= 4 × 25 - 80 + 10 = 30
= 20 + 10 = 30
= 30 = 30
As we have found our answer, there is no need to check further options.
Hence, ÷ and - is the correct answer.