By interchanging the given two signs which of the following equation will be not correct?
+ and –
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 18 ÷ 3 + 8 × 5 – 4 = 30.
Given conditions: + and –
Option 1: 18 ÷ 3 + 8 × 5 – 4 = 30
After interchanging the expression becomes:
= 18 ÷ 3 - 8 × 5 + 4 = 30
= 6 - 8 × 5 + 4 = 30
= 6 - 40 + 4 = 30
-30 = 30