\(\frac{-3}{-7}\)\(+\) \(\frac{5}{19}+\)\(\frac{-4}{7}\)

\(=\frac{16}{133}\)

Tl

-3/-7 + 5/19 + -4/ 7 += 16/133

nha HT 

nhớ k cho mik

cái đầu bòi

Mot nghin khong tram ba hai phan hai nghin hai tram sau muoi mot

mười sáu phần một trăn ba mươi ba

\(\frac{\text{-7}}{\text{6}}:x=\frac{\text{3}}{\text{7}}\)

=>\(x=\frac{\text{-7}}{\text{6}}:\frac{\text{3}}{\text{7}}\)

=> x = \(-2\frac{\text{13}}{\text{18}}\)

Vậy x = \(-2\frac{\text{13}}{\text{18}}\)

x=-49/18

\(\frac{1}{2}+-\frac{1}{5}+-\frac{5}{7}+\frac{1}{6}-\frac{3}{35}+\frac{1}{3}+\frac{1}{41}=\frac{1}{41}\)

1/41 giai ra dai nam cu rut gon roi quy dong

\(\dfrac{-7}{6}+\dfrac{18}{6}=\dfrac{11}{6}\)

` 5/9 . ( -2/13)+5/9.(-7/13)+(-8/13) = 5/9(-2/13-7/13)-8/13=5/9.(-9/13)-8/13=-5/13-8/13=-13/13=-1 `

GHI ra phân số đc ko

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

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

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

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