Đáp án đúng: B
Giải chi tiết:\(\begin{array}{l}\,\,\,\,\,12 \times \left( {4 + 6} \right)\\C1:\,\,\,\,12 \times \left( {4 + 6} \right) = 12 \times 10 = 120\\C2:\,\,\,12 \times \left( {4 + 6} \right) = 12 \times 4 + 12 \times 6\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,\,\,48\,\,\,\, + \,\,\,\,\,72\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,\,\,120\end{array}\)
Chọn B
