What will come in the place of '?' in the following equation, if '×' and '÷' are interchanged?
45×9+23−16÷7=?
- A-84
- B-79
- C-64
- D-76
Solution & Step-by-step Explanation
Given equation:
45×9+23−16÷7=?
Interchanging the signs '×' and '÷':
Wherever '×' is present, replace it with '÷'
Wherever '÷' is present, replace it with '×'
The rewritten equation becomes:
45÷9+23−16×7
Applying the BODMAS rule:
Division:
45÷9=5
Equation becomes:
5+23−16×7
Multiplication:
16×7=112
Equation becomes:
5+23−112
Addition:
5+23=28
Equation becomes:
28−112
Subtraction:
28−112=−84
Hence, the correct option is −84.
45×9+23−16÷7=?
Interchanging the signs '×' and '÷':
Wherever '×' is present, replace it with '÷'
Wherever '÷' is present, replace it with '×'
The rewritten equation becomes:
45÷9+23−16×7
Applying the BODMAS rule:
Division:
45÷9=5
Equation becomes:
5+23−16×7
Multiplication:
16×7=112
Equation becomes:
5+23−112
Addition:
5+23=28
Equation becomes:
28−112
Subtraction:
28−112=−84
Hence, the correct option is −84.