The value of −7 ÷ [5 + 1 ÷ 2 − {4 + (4 of 2 ÷ 4) + (4 ÷ 4 of 2)}] is:
Answer & explanation
Correct answer: option 4
7 ÷ [5 + 1 ÷ 2 - {4 + (4 of 2 ÷ 4) + (4 ÷ 4 of 2)}]
= - 7 ÷ [5 + 1 ÷ 2 - {4 + (8 ÷ 4) + (4 ÷ 8)}]
= - 7 ÷ [5 + 1 ÷ 2 - {4 + 2 + \(\frac{1}{2}\))}]
= - 7 ÷ [5 + \(\frac{1}{2}\)- 6.5]
= - 7 ÷ [5.5 - 6.5]
= \(\frac{-7}{-1}\) = 7