What should come in place of question mark (?) in the following question? (You do not have to calculate the exact value.)
(81.49 × 8.88 + 181.09) ÷ 12.77 = 43.74 + 1.23 × ?
Approximating the values to the nearest integer:
81.49 ≈ 81, 8.88 ≈ 9 and 181.09 ≈ 182
12.77 ≈ 13, 43.74 ≈ 44 and 1.23 ≈ 1
⇒ (81.49 × 8.88 + 181.09) ÷ 12.77 = 43.74 + 1.23 × ?
⇒ (81 × 9 + 181) ÷ 13 = 44 + 1 × ?
⇒ (729 + 181) ÷ 13 = 44 + 1 × ?
⇒ 910 ÷ 13 = 44 + 1 × ?
⇒ 70 = 44 + 1 × ?
⇒ 1 × ? = 26
⇒ ? = 26 /1
⇒ ? ≈ 26