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.15 + 5 ÷ 1 – 9 × 4 = 70.
Given conditions: × and –
Option 1: 15 + 5 ÷ 1 – 9 × 4 = 70
After interchanging the expression becomes:
15 + 5 ÷ 1 × 9 - 4 = 70
15 + 5 × 9 - 4 = 70
15 + 45 - 4 = 70
56 = 70