Cách làm cho bạn:
a) $(\frac{−2}{3})^{3}×(\frac{−2}{3})^{2}=(\frac{−2}{3})^{5}=\frac{−32}{243}$
b) $(0,15)^{7}:(0,15)^{5}=(0,15)^{2}$=0,0225
c) $(\frac{3}{5})^{15}:(\frac{27}{125})^{5}=(\frac{3}{5})^{15}:(\frac{3}{5})^{15}$=1
d) $(\frac{1}{7})^{4}.\frac{1}{7}.49^{3}=(\frac{1}{7})^{4}.\frac{1}{7}.7^{6}$=7
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