Đáp án+Giải thích các bước giải:
↓↓↓
a)$\frac{-1}{2}$ -$\frac{1}{3}$ +$\frac{1}{6}$
=$\frac{-3}{6}$ -$\frac{2}{6}$ +$\frac{1}{6}$
=$\frac{-3-2+1}{6}$
=$\frac{-4}{6}$ =$\frac{-2}{3}$
b)$\frac{-5}{11}$ . $\frac{7}{5}$ -$\frac{5}{11}$ .$\frac{8}{5}$ +$\frac{9}{11}$
=$\frac{-7}{11}$ -$\frac{8}{11}$ +$\frac{9}{11}$
=$\frac{-7-8+9}{11}$
=$\frac{-6}{11}$
c)$\frac{-5}{8}$ : ($\frac{4}{9}$ +$\frac{7}{12}$)
=$\frac{-5}{8}$ :$\frac{37}{36}$
=$\frac{-5}{8}$ .$\frac{36}{37}$
=$\frac{-45}{74}$
d) ($\frac{1}{2}$)³:1$\frac{3}{8}$ -25%.(6$\frac{2}{11}$ )
=($\frac{1}{2}$)³:1$\frac{3}{8}$ -$\frac{25}{100}$ .(6$\frac{2}{11}$ )
=$\frac{1}{8}$ :$\frac{11}{8}$- $\frac{1}{4}$ .$\frac{88}{11}$
=$\frac{1}{8}$.$\frac{8}{11}$ -$\frac{1}{4}$.8
=$\frac{1}{11}$ -2
=$\frac{1}{11}$-$\frac{22}{11}$
=$\frac{-21}{11}$
