A=$\frac{1}{3}$-$\frac{3}{4}$-$\frac{-3}{5}$+ $\frac{1}{64}$- $\frac{2}{9}$-$\frac{1}{36}$+ $\frac{1}{15}$
=$\frac{-5}{12}$-$\frac{-3}{5}$+ $\frac{1}{64}$- $\frac{2}{9}$-$\frac{1}{36}$+ $\frac{1}{15}$
=$\frac{11}{60}$ + $\frac{1}{64}$- $\frac{2}{9}$-$\frac{1}{36}$+ $\frac{1}{15}$
= $\frac{191}{930}$ - $\frac{2}{9}$-$\frac{1}{36}$+ $\frac{1}{15}$
= $\frac{-67}{2880}$-$\frac{1}{36}$+ $\frac{1}{15}$
= $\frac{-49}{960}$ +$\frac{1}{15}$
= $\frac{1}{64}$
Vậy A=$\frac{1}{64}$
CHÚC BẠN HỌC TỐT!!!
