Question

Giúp mk vs

Câu 1 :Tính

A= -7/12+11/8-5/9

B=1/7-8/7:8-3:3/4.(-2²)

C=1,4.15/49-(4/5+2/3):11/5

Câu 2 : Tìm x

a, -11x/12+3/4=1/6

b,-(1/6-x).2/3=2/3

Câu 3 : Tím các số nguyên x biết

1/-2<x/2= <_ 0

Câu 4 : So sánh

1/2.3 và 1/2-1/3

Giúp mk vs nhé mn ngày hôm nay là mk cần gấp rồi

Answer 1

\(\dfrac{-7}{12}+\dfrac{11}{8}-\dfrac{5}{9}=\dfrac{-7}{12}+\dfrac{59}{72}=\dfrac{17}{72}\) \(\dfrac{1}{7}-\dfrac{8}{7}:8-3:\dfrac{3}{4}.\left(-2\right)^2=\dfrac{1}{7}-\dfrac{1}{7}-4.4=\left(-16\right)\) \(\dfrac{1}{4}.\dfrac{15}{49}-\left(\dfrac{4}{5}+\dfrac{2}{3}\right):\dfrac{11}{5}=\dfrac{15}{49}-\dfrac{22}{15}:\dfrac{11}{5}=\dfrac{15}{49}-\dfrac{2}{3}=\dfrac{-53}{147}\)

Answer 2

\(\dfrac{-11x}{12}+\dfrac{3}{4}=\dfrac{1}{6}\Leftrightarrow\dfrac{-11x}{12}=\dfrac{1}{6}-\dfrac{3}{4}\Leftrightarrow\dfrac{-11x}{12}=\dfrac{-7}{12}\Leftrightarrow-11x=-7\Leftrightarrow x=\dfrac{7}{11}\)