Select the number that will come in the place of the question mark(?), if ‘+’ and ‘–‘ are interchanged and ‘x’ and ‘÷’ are interchanged in the expression: 63 × 7 ÷ 13 – 64 + 42 = ?

Question

Accepted Answer

Given expression: 63 × 7 ÷ 13 – 64 + 42

Interchange '+' and '–', and '×' and '÷'. So:
- '×' becomes '÷'
- '÷' becomes '×'
- '+' becomes '–'
- '–' becomes '+'

Rewrite the expression with these changes:
63 ÷ 7 × 13 + 64 – 42

Now solve step-by-step:
1) 63 ÷ 7 = 9
2) 9 × 13 = 117
3) 117 + 64 = 181
4) 181 – 42 = 139

Therefore, the value of the expression after interchanging the operators is 139.

Answer

Answer

Answer