Question

Answer 1

\(a.\\ \dfrac{-19}{6}+\dfrac{-5}{2}.\dfrac{1}{3}=\dfrac{-19}{6}+\dfrac{-5}{6}=\dfrac{-24}{6}=-4.\)

\(b.\\ \dfrac{-1}{2}+\dfrac{-2}{3}-\dfrac{3}{4}=\dfrac{-6-8-9}{12}=\dfrac{-23}{12}.\)

Answer 2

Câu 1: 

a: 1/2=6/12

2/3=8/12

3/4=9/12

b: -1/2=-10/20

-1/4=-5/20

-1/5=-4/20