Which two signs should be interchanged to make the given equation correct?
121 ÷ 11 + 54 - 9 × 3 = 128
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e ÷ and -
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Given equation: 121 ÷ 11 + 54 - 9 × 3 = 128 Check the options Option 1: + and × After interchanging the equation becomes; = 121 ÷ 11 × 54 - 9 + 3 = 588 is not equal to 128. Hence, option 1 is not the correct answer. |
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Option 2: + and - After interchanging the equation becomes; = 121 ÷ 11 - 54 + 9 × 3 = -16 is not equal to 128. Hence, option 2 is not the correct answer. |
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Option 3: × and ÷ After interchanging the equation becomes; = 121 × 11 + 54 - 9 ÷ 3 = 1382 is not equal to 128. Hence, option 3 is not the correct answer. |
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Option 4: ÷ and - After interchanging the equation becomes; = 121 - 11 + 54 ÷ 9 × 3 = 128 = 128 = 128. Hence, option 4 is the correct answer. |