Перемножить числа:
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 4\) | ||||
| x | ||||||
| \(\displaystyle 7\) | \(\displaystyle 4\) | \(\displaystyle 5\) | ||||
| \(\displaystyle +\) | ||||||
| \(\displaystyle +\) | ||||||
1. Умножаем единицы числа \(\displaystyle 74{\underline 5} \) (это число \(\displaystyle 5 \)) на число \(\displaystyle 454{\small,}\) получаем:
\(\displaystyle 5 \cdot 454=2270{\small.} \)
Записываем результат в первую строку:
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 4\) | ||||
| x | ||||||
| \(\displaystyle 7\) | \(\displaystyle 4\) | \(\displaystyle \bf5\) | ||||
| \(\displaystyle \bf2\) | \(\displaystyle \bf2\) | \(\displaystyle \bf7\) | \(\displaystyle \bf0\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
2. Умножаем десятки числа \(\displaystyle 7{\underline 4}5 \) (это число \(\displaystyle 4 \)) на число \(\displaystyle 454{\small,}\) получаем:
\(\displaystyle 4 \cdot 454=1816{\small.} \)
Записываем результат во вторую строку:
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 4\) | ||||
| x | ||||||
| \(\displaystyle 7\) | \(\displaystyle \bf4\) | \(\displaystyle 5\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 2\) | \(\displaystyle 7\) | \(\displaystyle 0\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle \bf1\) | \(\displaystyle \bf8\) | \(\displaystyle \bf1\) | \(\displaystyle \bf6\) | |||
\(\displaystyle +\) | ||||||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
3. Умножаем сотни числа \(\displaystyle {\underline 7}45 \) (это число \(\displaystyle 7 \)) на число \(\displaystyle 454{\small,}\) получаем:
\(\displaystyle 7 \cdot 454=3178 {\small.}\)
Записываем результат в третью строку:
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 4\) | ||||
| x | ||||||
| \(\displaystyle \bf7\) | \(\displaystyle 4\) | \(\displaystyle 5\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 2\) | \(\displaystyle 7\) | \(\displaystyle 0\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 1\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle \bf3\) | \(\displaystyle \bf1\) | \(\displaystyle \bf7\) | \(\displaystyle \bf8\) | |||
| \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | \(\displaystyle {\small?}\) | |
4. Складываем числа:
| \(\displaystyle 2\) | \(\displaystyle 2\) | \(\displaystyle 7\) | \(\displaystyle 0\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 1\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle 3\) | \(\displaystyle 1\) | \(\displaystyle 7\) | \(\displaystyle 8\) | |||
| \(\displaystyle 3\) | \(\displaystyle 3\) | \(\displaystyle 8\) | \(\displaystyle 2\) | \(\displaystyle 3\) | \(\displaystyle 0\) | |
В итоге получаем:
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 4\) | ||||
| x | ||||||
| \(\displaystyle 7\) | \(\displaystyle 4\) | \(\displaystyle 5\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 2\) | \(\displaystyle 7\) | \(\displaystyle 0\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 1\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | ||||||
| \(\displaystyle 3\) | \(\displaystyle 1\) | \(\displaystyle 7\) | \(\displaystyle 8\) | |||
| \(\displaystyle \bf3\) | \(\displaystyle \bf3\) | \(\displaystyle \bf8\) | \(\displaystyle \bf2\) | \(\displaystyle \bf3\) | \(\displaystyle \bf0\) | |
Ответ: \(\displaystyle 338230{\small.} \)