\[\boxed{\mathbf{3.146}}\]
Пояснение.
Сначала делаем возведение в степень, затем все остальные действия.
Решение.
\[1)\ 2\frac{1}{4} \cdot 2^{3} = \frac{9}{4} \cdot 8 = 9 \cdot 2 = 18\]
\[2)\ 3\frac{1}{5}\ :2^{4} = \frac{16}{5}\ :16 = \frac{16}{5} \cdot \frac{1}{16} =\]
\[= \frac{1}{5}\]
\[3)\ 4,42 + (2,5)^{3} =\]
\[= 4,42 + 15,625 = 20,045\]
\[4)\ 30 - (3,6)^{2} = 30 - 12,96 =\]
\[= 17,04\]
\[5)\ 3^{3} \cdot \left( 1\frac{1}{3} \right)^{2} = 27 \cdot \left( \frac{4}{3} \right)^{2} =\]
\[= 27 \cdot \frac{16}{9} = 3 \cdot 16 = 48\]
\[6)\ \left( 3\frac{3}{4} \right)^{2}\ :\left( 1\frac{1}{4} \right)^{3} =\]
\[= \left( \frac{15}{4} \right)^{2}\ :\left( \frac{5}{4} \right)^{3} = \frac{225}{16}\ :\frac{125}{64} =\]
\[= \frac{225 \cdot 64}{16 \cdot 125} = \frac{9 \cdot 4}{5} = \frac{36}{5} = \frac{72}{10} =\]
\[= 7,2\]