Тапсырма
Сандарды көбейту:
| \(\displaystyle 9\) | \(\displaystyle 4\) | \(\displaystyle 5\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 2\) | \(\displaystyle 3\) | ||||
| \(\displaystyle +\) | |||||
Шешім
1.. \(\displaystyle 2\underline{3} \) санының бірліктерін (бұл \(\displaystyle 3 \)саны ) \(\displaystyle 945\)санына көбейтеміз:
\(\displaystyle 3 \cdot 945=2835 \).
| \(\displaystyle \bf9\) | \(\displaystyle \bf4\) | \(\displaystyle \bf5\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 2\) | \(\displaystyle \bf3\) | ||||
| \(\displaystyle \bf2\) | \(\displaystyle \bf8\) | \(\displaystyle \bf3\) | \(\displaystyle \bf5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | |
2. \(\displaystyle \underline{2}3 \)санының ондығын (бұл \(\displaystyle 2 \)саны ) \(\displaystyle 945\)санына көбейтеміз:
\(\displaystyle 2 \cdot 945=1890 \).
Нәтижені \(\displaystyle 1890\)бірліктері біз көбейткен санның астында болатындай етіп жазамыз; біздің жағдайда бұл \(\displaystyle \underline{2}3 \) санының ондығы (яғни \(\displaystyle 2 \) саны ):
| \(\displaystyle \bf9\) | \(\displaystyle \bf4\) | \(\displaystyle \bf5\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle \bf2\) | \(\displaystyle 3\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 8\) | \(\displaystyle 3\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle \bf1\) | \(\displaystyle \bf8\) | \(\displaystyle \bf9\) | \(\displaystyle \bf0\) | ||
| \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | \(\displaystyle ?\) | |
3. Сандарды қосамыз:
| \(\displaystyle 2\) | \(\displaystyle 8\) | \(\displaystyle 3\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 9\) | \(\displaystyle 0\) | ||
| \(\displaystyle \bf2\) | \(\displaystyle \bf1\) | \(\displaystyle \bf7\) | \(\displaystyle \bf3\) | \(\displaystyle \bf5\) | |
Нәтижесінде келесіні аламыз:
| \(\displaystyle 9\) | \(\displaystyle 4\) | \(\displaystyle 5\) | |||
| \(\displaystyle \times\) | |||||
| \(\displaystyle 2\) | \(\displaystyle 3\) | ||||
| \(\displaystyle 2\) | \(\displaystyle 8\) | \(\displaystyle 3\) | \(\displaystyle 5\) | ||
| \(\displaystyle +\) | |||||
| \(\displaystyle 1\) | \(\displaystyle 8\) | \(\displaystyle 9\) | \(\displaystyle 0\) | ||
| \(\displaystyle 2\) | \(\displaystyle 1\) | \(\displaystyle 7\) | \(\displaystyle 3\) | \(\displaystyle 5\) | |
Жауабы: \(\displaystyle 21735\).