\[\boxed{Стр.\ \mathbf{56}\text{.\ \ }\mathbf{ОК\ ГДЗ\ - \ домашка\ на\ 5}}\]
\[\boxed{\mathbf{1}.}\]
\[2 \cdot 9 = 9 \cdot 2 = 9 + 9 =\]
\[= 2 \cdot 8 + 2 = 2 \cdot 10 - 2 = 18\]
\[7 \cdot 2 = 2 \cdot 7 = 7 + 7 =\]
\[= 2 \cdot 8 - 2 = 2 \cdot 6 + 2 = 14\]
\[2 \cdot 5 = 5 \cdot 2 = 5 + 5 =\]
\[= 2 \cdot 4 + 2 = 2 \cdot 6 - 2 = 10\]
\[3 \cdot 2 = 2 \cdot 3 = 3 + 3 =\]
\[= 3 \cdot 3 - 3 = 2 \cdot 2 + 2 = 6\]
\[2 \cdot 6 = 6 \cdot 2 = 6 + 6 =\]
\[= 2 \cdot 5 + 2 = 2 \cdot 7 - 2 = 12\]
\[2 \cdot 8 = 8 \cdot 2 = 8 + 8 =\]
\[= 2 \cdot 7 + 2 = 2 \cdot 9 - 2 = 16\]
\[70\ :7 \cdot 5 = 10 \cdot 5 = 50\]
\[70\ :10 \cdot 2 = 7 \cdot 2 = 14\]
\[\boxed{\mathbf{2}.}\]
\[1)\ 6\ :3 = 2\ (мяча) - получил\ \]
\[каждый\ ребенок.\]
\[Ответ:2\ мяча.\]
\[2)\ 6\ :3 = 2\ (ребенка) -\]
\[получили\ яблоки.\]
\[Ответ:2\ ребенка.\]
\[\boxed{\mathbf{3}.}\]
\[1)\ 13 - 3 = 10\ (девочек) -\]
\[было\ в\ группе.\]
\[2)\ 13 + 10 = 23\ (ребенка) -\]
\[всего\ в\ группе.\]
\[Ответ:23\ ребенка.\]
\[\boxed{\mathbf{4}.}\]
\[61 - 32 = 29\]
\[29 + 32 = 61\]
\[17 + 29 = 46\]
\[46 - 17 = 29\]
\[35 - 18 = 17\]
\[17 + 18 = 35\]
\[47 + 26 = 73\]
\[73 - 26 = 47\]
\[\boxed{\mathbf{5}.}\]
\[1)\ 6 \cdot 2 = 12\]
\[12\ :2 = 6\]
\[12\ :6 = 2\]
\[2)\ 8 \cdot 2 = 16\]
\[16\ :2 = 8\]
\[16\ :8 = 2\]
\[3)\ 7 \cdot 2 = 14\]
\[14\ :2 = 7\]
\[14\ :7 = 2\]
\[\boxed{\mathbf{6}.}\]
\[Можно\ начертить\ и\ ломаную\ \]
\[из\ 3\ звеньев:два\ звена\ по\ 3\ см\ \]
\[и\ одно - 4\ см.\]
\[\boxed{\mathbf{Вопрос}.}\]
\[5 \cdot 8 = 40\]
\[5 \cdot 7 = 40 - 5 = 35\]
\[3 \cdot 7 = 21\]
\[7 \cdot 3 = 21\]
\[6 \cdot 4 = 24\]
\[6 \cdot 5 = 24 + 6 = 30\]
\[\boxed{\mathbf{Задание\ на\ полях}.\ Ребусы}\]