Cách làm cho bạn:
a) $\left (\frac{1}{2} \right )^{3}.4+\frac{3}{4}$= $\frac{1}{8}.4+\frac{3}{4}$= $\frac{4}{8}.4+\frac{3}{4}$= $\frac{2}{4}.4+\frac{3}{4}$=$\frac{5}{4}$;
b) $4^{3}:2^{5}+3^{5}:9^{2}$
= $\left ( 2^{2} \right )^{3}:2^{5}+3^{5}:\left ( 3^{2} \right )^{2}$
= $2^{6}:2^{5}+ 3^{5}:3^{4}$
= $2^{1}+3^{1}$
= 5
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