Which two mathematical signs should be interchanged to make the given equation correct?
(45 × 2) ÷ 15 – (6 × 3) + 10 – (63 ÷ 21) = 17
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. – and +.
Given equation: (45 × 2) ÷ 15 – (6 × 3) + 10 – (63 ÷ 21) = 17
option 1: – and +
After interchanging the expression becomes:
⇒ (45 × 2) ÷ 15 + (6 × 3) - 10 + (63 ÷ 21) = 17
⇒ 90 ÷ 15 + 18 - 10 + 3 = 17
⇒ 6 + 18 - 10 + 3 = 17
⇒ 17 = 17