\[\boxed{\mathbf{Страница}\mathbf{\ \ 61}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{48}\mathbf{.}\mathbf{\ }}\]
\[Х\] | \[2\] | \[7\] | \[3\] | \[9\] | \[5\] | \[4\] | \[8\] | \[6\] |
---|---|---|---|---|---|---|---|---|
\[6\] | \[12\] | \[42\] | \[18\] | \[54\] | \[30\] | \[24\] | \[48\] | \[36\] |
\[3\] | \[6\] | \[21\] | \[9\] | \[27\] | \[15\] | \[12\] | \[24\] | \[18\] |
\[5\] | \[10\] | \[35\] | \[15\] | \[45\] | \[25\] | \[20\] | \[40\] | \[30\] |
\[9\] | \[18\] | \[63\] | \[27\] | \[81\] | \[45\] | \[36\] | \[72\] | \[54\] |
\[4\] | \[8\] | \[28\] | \[12\] | \[36\] | \[20\] | \[16\] | \[32\] | \[24\] |
\[\boxed{\mathbf{49}\mathbf{.}\mathbf{\ }}\]
\[1)\ 51 - k = 9 \cdot 3\]
\[51 - k = 27\]
\[k = 51 - 27\]
\[k = 24.\]
\[\overline{51 - 24 = 9 \cdot 3}\]
\[27 = 27.\]
\[2)\ x - 16 = 72\ :8\]
\[x - 16 = 9\]
\[x = 9 + 16\]
\[x = 25.\]
\[\overline{25 - 16 = 72\ :8}\]
\[9 = 9.\]
\[3)\ a + 25 = 6 \cdot 7\]
\[a + 25 = 42\]
\[a = 42 - 25\]
\[a = 17.\]
\[\overline{17 + 25 = 6 \cdot 7}\]
\[42 = 42.\]
\[\boxed{\mathbf{50}\mathbf{.}\mathbf{\ }}\]
\[Длина\] | \[4\ см\] | \[4\ см\] | \[5\ см\] | \[7\ см\] | \[7\ см\] | \[7\ см\] | \[9\ см\] |
---|---|---|---|---|---|---|---|
\[Ширина\] | \[2\ см\] | \[3\ см\] | \[2\ см\] | \[8\ см\] | \[5\ см\] | \[4\ см\] | \[3\ см\] |
\[Площадь\] | \[8\ см^{2}\] | \[12\ см^{2}\] | \[10\ см^{2}\] | \[56\ см^{2}\] | \[35\ см^{2}\] | \[28\ см^{2}\] | \[27\ см^{2}\] |
\[\boxed{\mathbf{51}\mathbf{.}\mathbf{\ }}\]
\[7 \cdot x = 28\]
\[x = 4.\]
\[x \cdot 8 = 64\]
\[x = 8.\]
\[81\ :x = 9\]
\[x = 9.\]