a) -1/2 – 1/3 + 1/6 b) -5/11 x 7/5 – 5/11 x 8/5 + 9/11 c) -5/8 : (4/9 + 7/12) d) ( 1/2)mũ 3 :1 3/8- 25% x (6 2/11)

a) -1/2 – 1/3 + 1/6
b) -5/11 x 7/5 – 5/11 x 8/5 + 9/11
c) -5/8 : (4/9 + 7/12)
d) ( 1/2)mũ 3 :1 3/8- 25% x (6 2/11)

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  1. 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

    =$\frac{1}{11}$-$\frac{22}{11}$ 

    =$\frac{-21}{11}$ 

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