\[\boxed{\text{66\ (66).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ 84 - (36 + 24)\ :3 \cdot 2 =\]
\[= 84 - 60\ :3 \cdot 2 =\]
\[= 84 - 20 \cdot 2 = 84 - 40 = 44.\]
\[2)\ 187 - (87 - 40 - 17) \cdot 2 =\]
\[= 187 - (70 - 40) \cdot 2 =\]
\[= 187 - 30 \cdot 2 =\]
\[= 187 - 60 = 127.\]
\[3)\ (85 - 53) - (28 + 16)\ :4 =\]
\[= 32 - 44\ :4 = 32 - 11 = 21.\]
\[7)\ 28\ :4 \cdot 12 = 7 \cdot 12 =\]
\[= 7 \cdot (10 + 2) = 70 + 14 = 84.\]
\[8)\ 48\ :8 \cdot 13 = 6 \cdot 13 =\]
\[= 6 \cdot (10 + 3) = 60 + 18 = 78.\]
\[9)\ 35\ :5 \cdot 14 = 7 \cdot 14 =\]
\[= 7 \cdot (10 + 4) = 70 + 28 = 98.\ \]