\[\boxed{\mathbf{Страница}\mathbf{\ \ 65}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{62}\mathbf{.}\mathbf{\ }}\]
\[Пусть\ Наташе\ 12\ лет,\ тогда\ \]
\[Вере\ 5\ лет.\]
\[Через\ 4\ года\ разница\ в\ возрасте\ \]
\[не\ изменится.\]
\[Ответ:на\ 7\ лет.\]
\[\boxed{\mathbf{63}\mathbf{.}\mathbf{\ }}\]
\[7 \cdot 3 + 1 = 22\]
\[7 \cdot 4 + 23 = 28 + 23 = 51\]
\[8 \cdot 9 - 5 \cdot 7 = 72 - 35 = 37\]
\[100 - 6 \cdot 8 = 100 - 48 = 52\]
\[3 \cdot 8 + 66 = 24 + 66 = 90\]
\[100 - (9 \cdot 3 - 20) = 100 - 7 =\]
\[= 93\]
\[\boxed{\mathbf{64}\mathbf{.}\mathbf{\ }}\]
\[9 \cdot 9 - 2 = 79 \searrow\]
\[79 - 7 \cdot 9 = 16 \searrow\]
\[16\ :8 \cdot 9 = 18 \searrow\]
\[18\ :6 \cdot 5 = 15 \searrow\]
\[15 - 4 \cdot 3 = 3 \searrow\]
\[3 + 0 + 6 = 9 \searrow\]
\[9 \cdot 9 - 2 = 79\]
\[\boxed{\mathbf{65}\mathbf{.}\mathbf{\ }}\]
\[Длина\] | \[6\ см\] | \[6\ см\] | \[12\ см\] | \[4\ см\] | \[9\ см\] | \[10\ см\] | \[6\ см\] |
---|---|---|---|---|---|---|---|
\[Ширина\] | \[7\ см\] | \[9\ см\] | \[6\ см\] | \[8\ см\] | \[5\ см\] | \[6\ см\] | \[3\ см\] |
\[Площадь\] | \[42\ см^{2}\] | \[54\ см^{2}\] | \[72\ см^{2}\] | \[32\ см^{2}\] | \[45\ см^{2}\] | \[60\ см^{2}\] | \[18\ см^{2}\] |
\[Периметр\] | \[26\ см\] | \[30\ см\] | \[36\ см\] | \[24\ см\] | \[28\ см\] | \[32\ см\] | \[18\ см\] |