Which two sings should be interchanged to make the given equation correct?
(560 ÷ 80) + 90 × 8 – 38 = 600
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e × and +.
| Understanding |
|---|
|
Given equation: (560 ÷ 80) + 90 × 8 – 38 = 600 Let us check all the options: 1) ÷ and – The expression becomes: = (560 – 80) + 90 × 8 ÷ 38 = 480 + 90 × 0.210 = 480 + 18.9 = 498.9 Hence, option 1 is not the correct answer. |
|
2) + and ÷ The expression becomes: = (560 + 80) ÷ 90 × 8 – 38 = 640 ÷ 90 × 8 – 38 = 7.11 × 8 – 38 = 56.88 – 38 =18.88 Hence, option 2 is not the correct answer. |
|
3) × and + The expression becomes: = (560 ÷ 80) × 90 + 8 – 38 = 7 × 90 + 8 – 38 = 630 + 8 – 38 = 638 – 38 = 600 Hence, option 3 is the correct answer. |
|
4) + and – The expression becomes: = (560 ÷ 80) – 90 × 8 + 38 = 7 – 90 × 8 + 38 = 7 – 720 + 38 = 7 – 682 = – 675 Hence, option 4 is not the correct answer. |