a)\(\dfrac{-3}{15}+\dfrac{-5}{15}\)

b)\(\dfrac{4}{3}-\dfrac{4}{5}\)

c)\(-1+\dfrac{7}{15}\)

d)\(\dfrac{-1}{15}-\dfrac{7}{15}\)

a: \(\dfrac{-8}{15}=\dfrac{-6}{15}+\dfrac{-2}{15}\)

\(\dfrac{-8}{15}=\dfrac{-3}{15}+\dfrac{-5}{15}\)

\(\dfrac{-8}{15}=\dfrac{-1}{15}+\dfrac{-7}{15}\)

b: \(\dfrac{-8}{15}=\dfrac{16}{15}-\dfrac{24}{15}\)

\(\dfrac{-8}{15}=\dfrac{22}{15}-\dfrac{30}{15}\)

\(\dfrac{-8}{15}=\dfrac{9}{15}-\dfrac{17}{15}\)

a: \(\dfrac{-8}{15}=\dfrac{-2}{15}+\dfrac{-6}{15}\)

\(\dfrac{-8}{15}=\dfrac{-1}{15}+\dfrac{-7}{15}\)

\(\dfrac{-8}{15}=\dfrac{-4}{15}+\dfrac{-4}{15}\)

b: \(-\dfrac{8}{15}=\dfrac{17}{15}-\dfrac{25}{15}\)

\(\dfrac{-8}{15}=\dfrac{9}{15}-\dfrac{17}{15}\)

\(\dfrac{-8}{15}=\dfrac{10}{15}-\dfrac{18}{15}\)

Câu 1.

$\frac{1}{15}-\frac{9}{15}=\frac{-8}{15}$

$\frac{2}{15}-\frac{10}{15}=\frac{-8}{15}$

$\frac{3}{15}-\frac{11}{15}=\frac{-8}{15}$

Câu 2:

$\frac{-9}{15}+\frac{1}{15}=\frac{-8}{15}$

$\frac{-10}{15}+\frac{2}{15}=\frac{-8}{15}$

$\frac{-11}{15}+\frac{3}{15}=\frac{-8}{15}$

Câu 3:

$\frac{-7}{15}-\frac{1}{15}=\frac{-8}{15}$

$\frac{-6}{15}-\frac{2}{15}=\frac{-8}{15}$

$\frac{-5}{15}-\frac{3}{15}=\frac{-8}{15}$

a)\({\\{-4} \over 11}\)+\({\\{-5} \over 11}\)=\({\\{-9} \over 11}\)

b)\({\\{10} \over 11}\)-\({\\{19} \over 11}\)=\({\\{-9} \over 11}\)

a, \(\frac{8}{15}=-\frac{4}{15}-\left(-\frac{12}{15}\right)\)

b, \(\frac{8}{15}=\frac{1}{15}+\frac{7}{15}\)

Bài này có nhiều cách lắm

Bn có thể tìm hộ mk 2 cách nx đc ko ạ.

Mình còn 1 cách khác nè bạn 

a) 8/15= -2/15-(-2/3)

b)8/15 = 1/5 + 1/3

Nếu đúng tk cho mình nhé

a) \(\frac{-5}{16}=\frac{-2}{16}+\frac{-3}{16}\)

b) \(\frac{-5}{16}=\frac{4}{16}-\frac{9}{16}\)

a)\(-\frac{5}{16}=-\frac{1}{16}+\left(-\frac{1}{4}\right)=-\frac{1}{8}+\left(-\frac{3}{16}\right)\)

b) \(-\frac{5}{16}=\frac{5}{16}-\frac{5}{8}\)