Письменное умножение на двузначное число: 68*57, 56*39, 64*38, 43*56, 75*23, 67*46, 385*36, 257*45, 526*59.

1. $68 \times 57$ $\begin{array}{r} 68 \\ \times 57 \\ \hline 476 \\ 340 \phantom{0} \\ \hline 3876 \end{array}$ 2. $56 \times 39$ $\begin{array}{r} 56 \\ \times 39 \\ \hline 504 \\ 168 \phantom{0} \\ \hline 2184 \end{array}$ 3. $64 \times 38$ $\begin{array}{r} 64 \\ \times 38 \\ \hline 512 \\ 192 \phantom{0} \\ \hline 2432 \end{array}$ 4. $43 \times 56$ $\begin{array}{r} 43 \\ \times 56 \\ \hline 258 \\ 215 \phantom{0} \\ \hline 2408 \end{array}$ 5. $75 \times 23$ $\begin{array}{r} 75 \\ \times 23 \\ \hline 225 \\ 150 \phantom{0} \\ \hline 1725 \end{array}$ 6. $67 \times 46$ $\begin{array}{r} 67 \\ \times 46 \\ \hline 402 \\ 268 \phantom{0} \\ \hline 3082 \end{array}$ 7. $385 \times 36$ $\begin{array}{r} 385 \\ \times 36 \\ \hline 2310 \\ 1155 \phantom{0} \\ \hline 13860 \end{array}$ 8. $257 \times 45$ $\begin{array}{r} 257 \\ \times 45 \\ \hline 1285 \\ 1028 \phantom{0} \\ \hline 11565 \end{array}$ 9. $526 \times 59$ $\begin{array}{r} 526 \\ \times 59 \\ \hline 4734 \\ 2630 \phantom{0} \\ \hline 31034 \end{array}$