Which two signs should be interchanged to make the equation mathematically correct?
35 + 21 – 168 ÷ 28 × 7 = 154
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. × and –.
Given equation: 35 + 21 – 168 ÷ 28 × 7 = 154
Option 3: × and –
After interchanging the expression becomes:
35 + 21 × 168 ÷ 28 – 7 = 154
35 + 21 × 6 – 7
35 + 126 – 7
154 = 154.