=4/35 nha bạn

=4/35 nha mik đoán vậy

= -584/495 

hay ÂM 584 PHẦN 495 

sai thì thôi nha !!!

    \(\left(-\dfrac{5}{9}\right)+\dfrac{8}{18}+\left(-\dfrac{12}{11}\right)+\left(-\dfrac{4}{9}\right)+\dfrac{7}{15}\)
\(=\left[\dfrac{4}{9}+\left(-\dfrac{4}{9}\right)\right]+\left(-\dfrac{5}{9}\right)+\left(-\dfrac{12}{11}\right)+\dfrac{7}{15}\)
\(=-\dfrac{224}{495}\)

-7/10-7/25

=-7(1/10+1/25)

=-7(5+2)/50

=-49/50

-49/50 nha

= 16/46367 nha !!!

\(\frac{4}{199}\) \(.\frac{4}{233}\) \(=\frac{16}{46367}\)

#Ye Chi-Lien

\(\frac{3}{4}+\frac{-1}{3}+\frac{-5}{18}\)

\(=\frac{5}{12}+\frac{-5}{18}\)

\(=\frac{5}{36}\)

4 câu nè bn

\(=\dfrac{10}{17}-\dfrac{5}{3}+7-\dfrac{8}{13}+\dfrac{11}{25}\)

\(=\dfrac{30}{51}-\dfrac{85}{51}+\dfrac{175}{25}+\dfrac{11}{25}-\dfrac{8}{13}\)

\(=\dfrac{-55}{51}+\dfrac{186}{25}-\dfrac{8}{13}\)

\(=\dfrac{-55\cdot325+186\cdot663-8\cdot1275}{16575}=\dfrac{95243}{16575}\)

Ta có: \(\frac{-1}{9}\cdot\frac{-3}{5}-\frac56\cdot\frac{3}{-5}+\frac{-5}{2}\cdot\frac35\)

\(=\frac19\cdot\frac35+\frac56\cdot\frac35+\frac35\cdot\frac{-5}{2}\)

\(=\frac35\left(\frac19+\frac56-\frac52\right)\)

\(=\frac35\left(\frac{2}{18}+\frac{15}{18}-\frac{45}{18}\right)=\frac35\cdot\frac{2-30}{18}=\frac35\cdot\frac{-28}{18}=\frac35\cdot\frac{-14}{9}=\frac{-42}{45}=-\frac{14}{15}\)

a.-0.875

b.-0.5