Задание
Перемножить числа:
| \(\displaystyle \times\) | \(\displaystyle 7\) | \(\displaystyle 2\) | ||
| \(\displaystyle 3\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | ||||
Решение
1. Умножаем единицы числа \(\displaystyle 3\underline{6} \) (это цифра \(\displaystyle 6\)) на число \(\displaystyle 72{\small : }\)
\(\displaystyle 6\cdot 72=432{\small . }\)
| \(\displaystyle \times\) | \(\displaystyle \bf 7\) | \(\displaystyle \bf 2\) | ||
| \(\displaystyle 3\) | \(\displaystyle \bf 6\) | |||
| \(\displaystyle +\) | \(\displaystyle \bf 4\) | \(\displaystyle \bf 3\) | \(\displaystyle \bf 2\) | |
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) |
2. Умножаем десятки числа \(\displaystyle \underline{3}6\) (это цифра \(\displaystyle 3\)) на число \(\displaystyle 72{\small : }\)
\(\displaystyle 3\cdot 72=216{\small . }\)
| \(\displaystyle \times\) | \(\displaystyle \bf 7\) | \(\displaystyle \bf 2\) | ||
| \(\displaystyle \bf 3\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | \(\displaystyle 4\) | \(\displaystyle 3\) | \(\displaystyle 2\) | |
| \(\displaystyle \bf 2\) | \(\displaystyle \bf 1\) | \(\displaystyle \bf 6\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) |
3. Складываем числа:
| \(\displaystyle +\) | \(\displaystyle 4\) | \(\displaystyle 3\) | \(\displaystyle 2\) | |
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 6\) | ||
| \(\displaystyle 2\) | \(\displaystyle 5\) | \(\displaystyle 9\) | \(\displaystyle 2\) |
В итоге мы получаем:
| \(\displaystyle \times\) | \(\displaystyle 7\) | \(\displaystyle 2\) | ||
| \(\displaystyle 3\) | \(\displaystyle 6\) | |||
| \(\displaystyle +\) | \(\displaystyle 4\) | \(\displaystyle 3\) | \(\displaystyle 2\) | |
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 6\) | ||
| \(\displaystyle 2\) | \(\displaystyle 5\) | \(\displaystyle 9\) | \(\displaystyle 2\) |
Ответ: \(\displaystyle 2592{\small . }\)