Which two signs or numbers need to be interchanged to make the following equation correct?
(18 ÷ 9) + 9 × 8 = 24
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e +, ÷.
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Given expression: (18 ÷ 9) + 9 × 8 = 24 Check the options: Option 1: +, × After replacement the equation becomes; =(18 ÷ 9) × 9 + 8 =2 × 9 + 8 =18 + 8 =26 Hence, option 1 is not the correct answer. |
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Option 2: +, ÷ After replacement the equation becomes; =(18 + 9) ÷ 9 × 8 =27 ÷ 9 × 8 =3 × 8 =24 Hence, option 2 is the correct answer. |
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Option 3: × , ÷ After replacement the equation becomes; = (18 × 9) + 9 ÷ 8 = 162 + 9 ÷ 8 = 162 + 1.125 = 163.125 Hence, option 3 is not the correct answer. |
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Option 4: 18, 8 After replacement the equation becomes; = (8 ÷ 9) + 9 × 18 = 0.88 + 9 × 18 = 0.88 + 162 = 162.88 Hence, option 4 is not the correct answer. |