Which two signs need to be interchanged to make the following equation correct?
16 ÷ 32 × 128 + 9 – 17 = – 4
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. × and ÷.
Given equation: 16 ÷ 32 × 128 + 9 – 17 = – 4
Option 1: × and –
After interchanging the expression becomes:
= 16 ÷ 32 - 128 + 9 × 17 = – 4
= 25.5 is not equal to -4.
Option 2: ÷ and +
After interchanging the expression becomes:
= 16 + 32 × 128 ÷ 9 – 17 = – 4
= 454.11 is not equal to -4.
Option 3: × and ÷
After interchanging the expression becomes:
= 16 × 32 ÷ 128 + 9 – 17 = – 4
= -4 is equal to -4.
As we have found our answer, so, there is no need of checking other options.
Hence, option 3 is the correct answer.