Đặt tính rồi tính:

Đặt tính rồi tính:

369 × 12

218 × 34

412 × 21

785 × 23

Trả lời

$\begin{array}{l}\times \underset{¯}{\begin{array}{l}369\\ 12\end{array}}\\ 738\\ \underset{¯}{369}\\ 4428\end{array}$$\begin{array}{l}\times \underset{¯}{\begin{array}{l}218\\ 34\end{array}}\\ 872\\ \underset{¯}{654}\\ 7412\end{array}$$\begin{array}{l}\times \underset{¯}{\begin{array}{l}412\\ 21\end{array}}\\ 412\\ \underset{¯}{824}\\ 8652\end{array}$$\begin{array}{l}\times \underset{¯}{\begin{array}{l}785\\ 23\end{array}}\\ 2355\\ \underset{¯}{1570}\\ 18055\end{array}$