Question

giúp mik vs, cảm ơn

Answer 1

Bài 4: 

a: \(A=\dfrac{4}{11}+\dfrac{7}{11}-\dfrac{5}{13}-\dfrac{8}{13}=1-1=0\)

b: \(B=\left(-\dfrac{7}{25}-\dfrac{18}{25}\right)+\left(\dfrac{4}{23}+\dfrac{19}{23}\right)+\dfrac{5}{7}=\dfrac{5}{7}\)

c: \(C=\dfrac{7}{13}\left(-\dfrac{4}{9}-\dfrac{5}{9}\right)=-\dfrac{7}{13}\)

d: \(=-\dfrac{5}{7}\left(\dfrac{2}{11}+\dfrac{9}{14}\right)+1+\dfrac{5}{7}=-\dfrac{635}{1078}+\dfrac{12}{7}=\dfrac{1213}{1078}\)

e: \(=8+\dfrac{2}{7}-3-\dfrac{4}{9}-4-\dfrac{2}{7}=1-\dfrac{4}{9}=\dfrac{5}{9}\)

Answer 2

bn Nguyễn Lê Phước Thịnh giải lung tung quá, mik ko hiểu lẫn lộn cả bài 5