Chia đều 36 hình mặt cười cho 3 bạn. Mỗi bạn được bao nhiêu hình?

 Em đặt tính rồi thực hiện phép chia từ trái sang phải.

a)          $\begin{array}{l}\begin{array}{c}48\\ \underset{¯}{4}\end{array}\begin{array}{c}4\\ 12\end{array}\\ 08\\ \underset{¯}{8}\\ 0\end{array}$                                   $\begin{array}{l}\begin{array}{c}55\\ \underset{¯}{5}\end{array}\begin{array}{c}5\\ 11\end{array}\\ 05\\ \underset{¯}{5}\\ 0\end{array}$                                     $\begin{array}{l}\begin{array}{c}42\\ \underset{¯}{4}\end{array}\begin{array}{c}2\\ 21\end{array}\\ 02\\ \underset{¯}{2}\\ 0\end{array}$             

48 : 4 = 12                                       55 : 5 = 11                                     42 : 2 = 21

b)

           $\begin{array}{l}\begin{array}{c}47\\ \underset{¯}{3}\end{array}\begin{array}{c}3\\ 15\end{array}\\ 17\\ \underset{¯}{15}\\ 02\end{array}$                                           $\begin{array}{l}\begin{array}{c}71\\ \underset{¯}{4}\end{array}\begin{array}{c}4\\ 17\end{array}\\ 31\\ \underset{¯}{28}\\ 03\end{array}$                                  $\begin{array}{l}\begin{array}{c}92\\ \underset{¯}{5}\end{array}\begin{array}{c}5\\ 18\end{array}\\ 42\\ \underset{¯}{40}\\ 02\end{array}$          

47 : 3 = 15 (dư 2)                                 71 : 4 = 17 (dư 3)                       92 : 5 = 18 (dư 2)