Тапсырма
Сандарды көбейту:
| \(\displaystyle 4\) | \(\displaystyle 3\) | \(\displaystyle 7\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 7\) | \(\displaystyle 5\) | ||||
| \(\displaystyle +\) | |||||
Шешім
1. \(\displaystyle 7\underline{5}\)санының бірліктерін (бұл \(\displaystyle 5 \)саны) \(\displaystyle 437\)санына көбейтеміз:
\(\displaystyle 5 \cdot 437=2185 \).
| \(\displaystyle \bf4\) | \(\displaystyle \bf3\) | \(\displaystyle \bf7\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 7\) | \(\displaystyle \bf5\) | ||||
| \(\displaystyle \bf2\) | \(\displaystyle \bf1\) | \(\displaystyle \bf8\) | \(\displaystyle \bf5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | |
2. \(\displaystyle \underline{7}5\)санының ондығын (бұл \(\displaystyle 7 \)саны) \(\displaystyle 437\)санына көбейтеміз:
\(\displaystyle 7 \cdot 437=3059 \).
Нәтижені \(\displaystyle 3059\)бірліктері біз көбейткен санның астында болатындай етіп жазамыз; біздің жағдайда бұл \(\displaystyle \underline{7}5\) санының ондығы (яғни \(\displaystyle 7 \)саны):
| \(\displaystyle \bf4\) | \(\displaystyle \bf3\) | \(\displaystyle \bf7\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle \bf7\) | \(\displaystyle 5\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle \bf3\) | \(\displaystyle \bf0\) | \(\displaystyle \bf5\) | \(\displaystyle \bf9\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | |
3. . Сандарды қосамыз:
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle 3\) | \(\displaystyle 0\) | \(\displaystyle 5\) | \(\displaystyle 9\) | ||
| \(\displaystyle \bf3\) | \(\displaystyle \bf2\) | \(\displaystyle \bf7\) | \(\displaystyle \bf7\) | \(\displaystyle \bf5\) | |
Нәтижесінде келесіні аламыз:
| \(\displaystyle 4\) | \(\displaystyle 3\) | \(\displaystyle 7\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 7\) | \(\displaystyle 5\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle 3\) | \(\displaystyle 0\) | \(\displaystyle 5\) | \(\displaystyle 9\) | ||
| \(\displaystyle 3\) | \(\displaystyle 2\) | \(\displaystyle 7\) | \(\displaystyle 7\) | \(\displaystyle 5\) | |
Жауабы: \(\displaystyle 32775\).