Задание
Перемножить числа:
| \(\displaystyle \times\) | \(\displaystyle 7\) | \(\displaystyle 6\) | ||
| \(\displaystyle 6\) | \(\displaystyle 9\) | |||
| \(\displaystyle +\) | ||||
Решение
1. Умножаем единицы числа \(\displaystyle 6\underline{9} \) (это цифра \(\displaystyle 9\)) на число \(\displaystyle 76{\small : }\)
\(\displaystyle 9\cdot 76=684{\small . }\)
| \(\displaystyle \times\) | \(\displaystyle \bf 7\) | \(\displaystyle \bf 6\) | ||
| \(\displaystyle 6\) | \(\displaystyle \bf 9\) | |||
| \(\displaystyle +\) | \(\displaystyle \bf 6\) | \(\displaystyle \bf 8\) | \(\displaystyle \bf 4\) | |
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) |
2. Умножаем десятки числа \(\displaystyle \underline{6}9\) (это цифра \(\displaystyle 6\)) на число \(\displaystyle 76{\small : }\)
\(\displaystyle 6\cdot 76=456{\small . }\)
| \(\displaystyle \times\) | \(\displaystyle \bf 7\) | \(\displaystyle \bf 6\) | ||
| \(\displaystyle \bf 6\) | \(\displaystyle 9\) | |||
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle 8\) | \(\displaystyle 4\) | |
| \(\displaystyle \bf 4\) | \(\displaystyle \bf 5\) | \(\displaystyle \bf 6\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) |
3. Складываем числа:
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle 8\) | \(\displaystyle 4\) | |
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 6\) | ||
| \(\displaystyle 5\) | \(\displaystyle 2\) | \(\displaystyle 4\) | \(\displaystyle 4\) |
В итоге мы получаем:
| \(\displaystyle \times\) | \(\displaystyle 7\) | \(\displaystyle 6\) | ||
| \(\displaystyle 6\) | \(\displaystyle 9\) | |||
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle 8\) | \(\displaystyle 4\) | |
| \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 6\) | ||
| \(\displaystyle 5\) | \(\displaystyle 2\) | \(\displaystyle 4\) | \(\displaystyle 4\) |
Ответ: \(\displaystyle 5244{\small . }\)