Insert parentheses, if needed, to make the expression on the left equal to the number on the right.7 ? 3 + 9 ÷ 2 + 2 = 21

A. 7 ? 3 + 9 ÷ (2 + 2) = 21
B. 7 ? 3 + (9 ÷ 2) + 2 = 21
C. 7 ? (3 + 9) ÷ 2 + 2 = 21
D. 7 ? (3 + 9) ÷ (2 + 2) = 21


Answer: D

Mathematics

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