\[\boxed{\mathbf{Страница}\mathbf{\ 8}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{21}\mathbf{.}\mathbf{\ }}\]
\[56\ :1 - 48\ :4 = 56 - 12 = 44\]
\[(26 + 38)\ :8 = 64\ :8 = 8\]
\[(58 + 14)\ :6 = 72\ :6 = 12\]
\[96 - 4 \cdot 12 + 51 =\]
\[= 96 - 48 + 51 = 99\]
\[31 + 67 - 3 \cdot 32 = 98 - 96 = 2\]
\[72\ :3 + 76 - 10 = 24 + 66 = 90\]
\[\boxed{\mathbf{22}\mathbf{.}\mathbf{\ }}\]
\[1)\ 48\ :3 = 16\ (марок) - у\ Даши.\]
\[2)\ 16 + 23 = 39\ (марок) - у\ \]
\[Вовы.\]
\[3)\ 48 + 16 + 39 =\]
\[= 103\ (марки) - всего\ у\ ребят.\]
\[Ответ:103\ марки.\]
\[\boxed{\mathbf{23}\mathbf{.}\mathbf{\ }}\]
\[Сотни\] | \[Десятки\] | \[Единицы\] | |
---|---|---|---|
\[ІІІ\ разряд\] | \[ІІ\ разряд\] | \[І\ разряд\] | |
\[781\] | \[7\] | \[8\] | \[1\] |
\[906\] | \[9\] | \[0\] | \[6\] |
\[650\] | \[6\] | \[5\] | \[0\] |
\[\boxed{\mathbf{24}\mathbf{.}\mathbf{\ }}\]
\[\boxed{\mathbf{25}\mathbf{.}\mathbf{\ }}\]
\[78\ :6 = 13 \cdot 5 = 65 \cdot 10 =\]
\[= 650 - 450 = 200\ :4 = 50\]