\[\boxed{\mathbf{Страница\ 58.\ }\mathbf{Еуроки\ - \ ДЗ\ без\ мороки}}\]
\[\boxed{\mathbf{2.\ }}\]
\[\textbf{а)}\ \left( 78 +^{1}22 \right){\ :}^{2}2 = 50\]
\[1)\ 78 + 22 = 100\]
\[2)\ 100\ :2 = 50\]
\[Ответ:50.\]
\[\textbf{б)}\ 78 +^{2}22\ :^{1}2 = 89\]
\[1)\ 22\ :2 = 11\]
\[2)\ 78 + 11 = 89\]
\[Ответ:89.\]
\[\textbf{в)}\ 319 -^{3}\left( 42 +^{1}68 \right){\ :}^{2}10 = 308\]
\[1)\ 42 + 68 = 110\]
\[2)\ 110\ :10 = 11\]
\[3)\ 319 - 11 = 308\]
\[Ответ:308.\]
\[\textbf{г)}\ 927 -^{2}139 +^{3}65{\ :}^{1}5 = 801\]
\[1)\ 65\ :5 = 13\]
\[2)\ 927 - 139 = 788\]
\[3)\ 788 + 13 = 801\]
\[Ответ:801.\]
\[\textbf{д)}\ 418 \cdot^{1}5 +^{3}315{\ :}^{2}5 = 2153\]
\[1)\ 418 \cdot 5 = 2090\]
\[2)\ 315\ :5 = 63\]
\[3)\ 2090 + 63 = 2153\]
\[Ответ:2153.\]
\[\textbf{е)}\ 994\ :^{2}\left( 49 +^{1}22 \right) -^{3}10 = 4\]
\[1)\ 49 + 22 = 71\]
\[2)\ 994\ :71 = 14\]
\[3)\ 14 - 10 = 4\]
\[Ответ:4.\]
\[2)\ 1674\ :837 = 2\]
\[3)\ 101 - 2 = 99\]
\[4)\ 936\ 439 - 99 = 936\ 340\]
\[Ответ:\ 936\ 340.\]
\[1)\ 13546 - 9878 = 3668\]
\[2)\ 3668 \cdot 326 = 1\ 195\ 768\]
\[3)\ 100\ 000 - 84\ 364 = 15\ 636\]
\[4)\ 15\ 636 \cdot 502 = 7\ 849\ 272\]
\[5)\ 1\ 195\ 768 + 7\ 849\ 272 =\]
\[= 9\ 045\ 040\]
\[Ответ:9\ 045\ 040.\]