\[\boxed{\mathbf{1.}}\]
\[1)\ (90 + 60 + 90)\ :3 =\]
\[= 240\ :3 = 80\]
\[2)\ (80 + 20 + 35 + 69)\ :4 =\]
\[= 204\ :4 = 51\]
\[3)\ (150 + 250 + 100 + 200 + 50)\ :5 =\]
\[= 750\ :5 = 150\]
\[\boxed{\mathbf{2.}}\]
\[1)\ 26 \cdot 10 - 26 = 260 - 26 =\]
\[= 234\]
\[2)\ 32 \cdot 19 + 32 = 32 \cdot 20 = 640\]
\[3)\ 70 \cdot 12 + 12 = 840 + 12 =\]
\[= 852\]
\[4)\ 35 \cdot 18 - 35 \cdot 8 = 35 \cdot 10 =\]
\[= 350\]
\[\boxed{\mathbf{3.}}\]
\[84\] | \[313\] | \[209\] | \[900\] | \[801\] |
---|---|---|---|---|
\[О\] | \[М\] | \[Е\] | \[Г\] | \[А\] |