Thực hiện phép tính

gấp 
----- Nội dung ảnh -----
Câu 1. Thực hiện phép tính:
a) $\left( \frac{3}{4} - \frac{2}{7} \right) \cdot \left( \frac{1}{5} - \frac{4}{7} \right) = \frac{2}{3}$

b) $\left( -1 \right)^{\frac{6}{7}} \cdot \frac{14}{15} \cdot (-1)^{\frac{2}{3}} = (-1)^{9}$

c) $-4 \cdot \left( -\frac{1}{2} \right) + 1 \cdot \sqrt{\frac{9}{4}} = \sqrt{25}$

d) $6 - 3 \cdot \left( -\frac{1}{3} \right)^{\frac{1}{4}} \cdot \sqrt{0.9}$

e) $\left( -1 \right)^{2} \cdot \frac{16}{25} + \sqrt{81} - \frac{1}{4} \cdot \sqrt{9}$

f) $0.75 + \sqrt{\frac{4}{81}} - \frac{64}{15} \cdot \frac{25}{144}$

g) $2^{3} \cdot \left( -\frac{1}{2} \right)^{2} - 2^{-2} + (-2)^{-2} = 8$

h) $i) 2^{\frac{2}{3}} \left\{ \left( 3,72 - 0,02 \right)^{10} \cdot \frac{5}{37} \cdot 6 + 2,8 \right\} = \frac{7}{15}$