Question

Giúp mik bài 4 đi ạ

Answer 1

Bài 1: 

a: 3/5+4/9=27/45+20/45=47/45

Bài 4: 

a: =1/5+1/6+5/8=24/120+20/120+75/120=119/120

b: =8/12+2/12+5/12=15/12=5/4

Answer 2

 a)\(\dfrac{1}{5}+\dfrac{1}{6}+\dfrac{5}{8}=\dfrac{24}{120}+\dfrac{20}{120}+\dfrac{75}{120}=\dfrac{119}{120}\)

b)\(\dfrac{8}{12}+\dfrac{2}{12}+\dfrac{5}{12}=\dfrac{15}{12}=\dfrac{5}{4}\)