Перемножить числа:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| x | |||||
| \(\displaystyle 3\) | \(\displaystyle 2\) | \(\displaystyle 1\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle +\) | |||||
1. Умножаем единицы числа \(\displaystyle 32{\underline 1} \) (это число \(\displaystyle 1 \)) на число \(\displaystyle 211{\small,}\) получаем:
\(\displaystyle 1 \cdot 211=211 {\small.}\)
Записываем результат в первую строку:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| x | |||||
| \(\displaystyle 3\) | \(\displaystyle 2\) | \(\displaystyle \bf 1\) | |||
| \(\displaystyle \bf 2\) | \(\displaystyle \bf 1\) | \(\displaystyle \bf 1\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
2. Умножаем десятки числа \(\displaystyle 3{\underline 2}1 \) (это число \(\displaystyle 2 \)) на число \(\displaystyle 211{\small,}\) получаем:
\(\displaystyle 2 \cdot 211=422 {\small.}\)
Записываем результат во вторую строку:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| x | |||||
| \(\displaystyle 3\) | \(\displaystyle \bf 2\) | \(\displaystyle 1\) | |||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle \bf 4\) | \(\displaystyle \bf 2\) | \(\displaystyle \bf 2\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
3. Умножаем сотни числа \(\displaystyle {\underline 3}21 \) (это число \(\displaystyle 3 \)) на число \(\displaystyle 211{\small,}\) получаем:
\(\displaystyle 3 \cdot 211=633 {\small.}\)
Записываем результат в третью строку:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| x | |||||
| \(\displaystyle \bf 3\) | \(\displaystyle 2\) | \(\displaystyle 1\) | |||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| \(\displaystyle \)+ | |||||
| \(\displaystyle 4\) | \(\displaystyle 2\) | \(\displaystyle 2\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle \bf 6\) | \(\displaystyle \bf 3\) | \(\displaystyle \bf 3\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
4. Складываем числа:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle 4\) | \(\displaystyle 2\) | \(\displaystyle 2\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle 6\) | \(\displaystyle 3\) | \(\displaystyle 3\) | |||
| \(\displaystyle 6\) | \(\displaystyle 7\) | \(\displaystyle 7\) | \(\displaystyle 3\) | \(\displaystyle 1\) | |
В итоге получаем:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| x | |||||
| \(\displaystyle 3\) | \(\displaystyle 2\) | \(\displaystyle 1\) | |||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 1\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle 4\) | \(\displaystyle 2\) | \(\displaystyle 2\) | |||
| \(\displaystyle +\) | |||||
| \(\displaystyle 6\) | \(\displaystyle 3\) | \(\displaystyle 3\) | |||
| \(\displaystyle \bf6\) | \(\displaystyle \bf7\) | \(\displaystyle \bf7\) | \(\displaystyle \bf3\) | \(\displaystyle \bf1\) | |
Ответ: \(\displaystyle 67731{\small.} \)