Question

[Võ Khánh Ly]

tính hợp lí 

-11/7 +  13/-2 + -6/17

13/-8 + -7/20 +3/-8

-4/7 + 11/5 + 1/5 + -7/3

Answer 1

[Võ Khánh Ly]

AI GIÚP EM VỚI Ạ

Answer 2

[『Kuroba ム Tsuki Ryoo ︵²ᵏ⁷』]

\(#N\)

\(-\dfrac{11}{7}+\dfrac{13}{-2}+-\dfrac{6}{17}=-\dfrac{113}{14}+-\dfrac{6}{17}=-\dfrac{2005}{238}\)

\(\dfrac{13}{-8}+-\dfrac{7}{20}+\dfrac{3}{-8}=\left(-\dfrac{13}{8}+-\dfrac{3}{8}\right)+-\dfrac{7}{20}=-2+-\dfrac{7}{20}=-\dfrac{47}{20}\)

\(-\dfrac{4}{7}+\dfrac{11}{5}+\dfrac{1}{5}+-\dfrac{7}{3}=-\dfrac{4}{7}+\left(\dfrac{11}{5}+\dfrac{1}{5}\right)+-\dfrac{7}{3}=-\dfrac{4}{7}+\dfrac{12}{5}+-\dfrac{7}{3}=-\dfrac{53}{105}\)