\[\boxed{\text{1.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[450 - 30 \cdot 4 + 70\ :10 =\]
\[= 450 - 120 + 7 = 330 + 7 =\]
\[= 337.\]
\[280\ :7 + 160 \cdot 5 + 70 =\]
\[= 40 + 800 + 70 =\]
\[= 840 + 70 = 910.\]
\[650 + 350 - 80\ :2 \cdot 5 =\]
\[= 650 + 350 - 40 \cdot 5 =\]
\[= 1\ 000 - 200 = 800.\]
\[180 + 20 \cdot 6 - 75\ :25 =\]
\[= 180 + 120 - 3 =\]
\[= 300 - 3 = 297.\ \]
\[\boxed{\text{2.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[980 - (150 + 30)\ :30 =\]
\[= 980 - 180\ :30 =\]
\[= 980 - 6 = 974.\]
\[1\ 600 + (470 - 70) \cdot 3 =\]
\[= 1\ 600 + 400 \cdot 3 =\]
\[= 1\ 600 + 1\ 200 = 2\ 800.\]
\[400 \cdot 3 - (750 - 550) \cdot 4 =\]
\[= 1\ 200 - 200 \cdot 4 =\]
\[= 1\ 200 - 800 = 400.\]
\[820 + (1\ 420 - 1\ 400) \cdot 8 =\]
\[= 820 + 20 \cdot 8 =\]
\[= 820 + 160 = 980.\ \]
\[\boxed{\text{3.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\boxed{\text{4.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[24 + 36\ :(2 \cdot 3) =\]
\[= 24 + 36\ :6 = 24 + 6 = 30.\]
\[(24 + 36)\ :2 \cdot 3 =\]
\[= 60\ :2 \cdot 3 = 30 \cdot 3 = 90.\]
\[(24 + 36\ :2) \cdot 3 =\]
\[= (24 + 18) \cdot 3 = 42 \cdot 3 = 126.\]
\[(20 \cdot 9 - 6)\ :3 =\]
\[= (180 - 6)\ :3 = 174\ :3 = 58.\]
\[20 \cdot (9 - 6\ :3) =\]
\[= 20 \cdot (9 - 2) = 20 \cdot 7 = 140.\]
\[20 \cdot (9 - 6)\ :3 = 20 \cdot 3\ :3 = 20.\ \]
\[\boxed{\text{5.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[a\] | \[200\] | \[200\] | \[320\] |
---|---|---|---|
\[b\] | \[80\] | \[90\] | \[90\] |
\[a + b\] | \[280\] | \[290\] | \[410\] |
\[a - b\] | \[120\] | \[110\] | \[230\] |
\[c\] | \[20\] | \[40\] | \[80\] |
---|---|---|---|
\[d\] | \[4\] | \[5\] | \[10\] |
\[c \cdot d\] | \[80\] | \[200\] | \[800\] |
\[c\ :d\] | \[5\] | \[8\] | \[8\] |
\[\boxed{\text{6.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\boxed{\text{7.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Величины