Đáp án đúng: A
Giải chi tiết:*Cách 1: Ta có: \(108:3 + 201:3 - 39:3 = 36 + 67 - 13 = 90\)
*Cách 2:
\(\begin{array}{l}108:3 + 201:3 - 39:3 = \left( {108 + 201 - 39} \right):3\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \left( {309 - 39} \right):3\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,270:3\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 90\end{array}\)
Đáp số: 90
Chọn A
