Question

A) -5/3 + 2/3 : (-1,5)

B) 5/14 - 3,7 - 19/14 + 8/9 - 6,3

c) [40%- một hai phần 3] : -3/2 + [-1/2]

D) -[8/9 + 7/5 - 2/11] + [ 2/5 + 17/9 - 13/11

 

Answer 1

a: \(=\dfrac{-5}{3}+\dfrac{-2}{3}\cdot5=\dfrac{-5-10}{3}=-\dfrac{15}{3}=-5\)

b: \(=\left(\dfrac{5}{14}-\dfrac{19}{14}\right)+\left(-3.7-6.3\right)+\dfrac{8}{9}\)

\(=\dfrac{8}{9}-1-10=\dfrac{8}{9}-11=\dfrac{8-99}{9}=\dfrac{-91}{9}\)

c: \(=\left(\dfrac{2}{5}-\dfrac{5}{3}\right)\cdot\dfrac{-2}{3}+\dfrac{-1}{2}\)

\(=\dfrac{-19}{15}\cdot\dfrac{-2}{3}+\dfrac{-1}{2}\)

\(=\dfrac{38}{15}-\dfrac{1}{2}=\dfrac{76-15}{30}=\dfrac{61}{30}\)

d: \(=-\dfrac{8}{9}-\dfrac{7}{5}+\dfrac{2}{11}+\dfrac{2}{5}+\dfrac{17}{9}-\dfrac{13}{11}\)

\(=1-1-1=-1\)