\[\boxed{Стр.\ \mathbf{85}\text{.\ \ }\mathbf{ОК\ ГДЗ\ - \ домашка\ на\ 5}}\]
\[\boxed{\mathbf{1}.}\]
\[35\ :7 + 19 = 5 + 19 = 24\]
\[63\ :7 + 37 = 9 + 37 = 46\]
\[42\ :6 + 56 = 7 + 56 = 63\]
\[31 - 56\ :7 = 31 - 8 = 23\]
\[48 + 49\ :7 = 48 + 7 = 55\]
\[33 - 45\ :9 = 33 - 5 = 28\]
\[54\ :6 + 86 = 9 + 86 = 95\]
\[42 - 28\ :4 = 42 - 7 = 35\]
\[36 - 36\ :9 = 36 - 4 = 32\]
\[\boxed{\mathbf{2}.}\]
\[7 \cdot 7 = 49\]
\[7 + 6 = 13\]
\[7 - 6 = 1\]
\[6 \cdot 6 = 36\]
\[32\ :4 = 8\]
\[32 - 8 = 24\]
\[54\ :6 = 9\]
\[54 - 6 = 48\]
\[54 + 6 = 60\]
\[42\ :7 = 6\]
\[36 + 6 = 42\]
\[16\ :4 = 4\]
\[\boxed{\mathbf{3}.}\]
\[1)\ 12 - 9 = 3\ (наклейки) -\]
\[стало\ меньше.\]
\[2)\ 40 - 3 = 37\ (наклеек) -\]
\[стало\ у\ мальчика\ после\ обмена.\]
\[Ответ:37\ наклеек.\]
\[Выражением:\]
\[40 - 12 + 9 = 28 + 9 =\]
\[= 37\ (наклеек) - стало\ \]
\[у\ мальчика\ после\ обмена.\]
\[Ответ:37\ наклеек.\]
\[\boxed{\mathbf{4}.}\]
\[99 - 88 + 1 = 11 + 1 =\]
\[= 12\ (учеников) - в\ этом\ \]
\[классе.\]
\[Ответ:12\ учеников.\]
\[\boxed{\mathbf{5}.}\]
\[59 + 27 = 86\]
\[75 - 38 = 37\]
\[83 - 47 = 36\]
\[74 - 45 = 29\]
\[54 + 26 = 80\]
\[\boxed{\mathbf{6}.}\]
\[Можно\ составить\ 12\ сумм.\]
\[60 + 20 = 80\]
\[60 + 30 = 90\]
\[60 + 40 = 100\]
\[59 + 20 = 79\]
\[59 + 30 = 89\]
\[59 + 40 = 99\]
\[58 + 20 = 78\]
\[58 + 30 = 88\]
\[58 + 40 = 98\]
\[57 + 20 = 77\]
\[57 + 30 = 87\]
\[57 + 40 = 97\]
\[Если\ убрать\ слагаемое\ 60,\ \]
\[то\ сумм\ будет\ на\ 3\ меньше.\]
\[\boxed{\mathbf{Вопрос}.}\]
\[(40 + 23)\ :7 = 63\ :7 = 9\]
\[(32 - 25) \cdot 8 = 7 \cdot 8 = 56\]
\[8 \cdot 7 - 50 = 56 - 50 = 6\]
\[\boxed{\mathbf{Задание\ на\ полях}.\ Цепочка}\]
\[45\ :5 = 9\]
\[9 \cdot 3 = 27\]
\[27 + 9 = 36\]
\[36\ :6 = 6\]
\[6 \cdot 4 = 24\]