\[\boxed{Стр.\ \mathbf{100}\text{.\ \ }\mathbf{ОК\ ГДЗ\ - \ домашка\ на\ 5}}\]
\[Проверим\ себя.\ Вариант\ 1\]
\[\boxed{\mathbf{1}.}\]
\[7\ дес.\ 8\ ед.\ = 70 + 8 = 78\]
\[Ответ:78.\]
\[\boxed{\mathbf{2}.}\]
\[4\ дес.\ - 4\ ед. = 40 - 4 = 36\]
\[Ответ:на\ 36.\]
\[\boxed{\mathbf{3}.}\]
\[50 - 6 = 44\]
\[Ответ:44.\]
\[\boxed{\mathbf{4}.}\]
\[48 - 10 = 38\]
\[Ответ:38.\]
\[\boxed{\mathbf{5}.}\]
\[60 - 40 = 20\]
\[Ответ:20.\]
\[\boxed{\mathbf{6}.}\]
\[60 - 6 = 54\]
\[Ответ:54.\]
\[\boxed{\mathbf{7}.}\]
\[74 - 4 = 70\]
\[Ответ:70.\]
\[\boxed{\mathbf{8}.}\]
\[70 - 3 = 67\]
\[Ответ:0\ и\ 3.\]
\[\boxed{\mathbf{9}.}\]
\[11 + 11 + 11 = 11 \cdot 3\]
\[Ответ:11 + 11 + 11.\]
\[\boxed{\mathbf{10}.}\]
\[8 \cdot 6 = 48\]
\[8 \cdot 7 = 8 \cdot 6 + 8 = 48 + 8 = 56\]
\[Ответ:56.\]