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

\(a,\dfrac{7}{15}=\dfrac{2}{15}+\dfrac{1}{3}\\ b,\dfrac{13}{27}=\dfrac{10}{27}+\dfrac{1}{9}\\ c,\dfrac{3}{18}=\dfrac{1}{18}+\dfrac{1}{9}\\ d,=\dfrac{1}{20}+\dfrac{1}{20}\)

Hi:D

\(\dfrac{14}{21}=\dfrac{14:7}{21:7}=\dfrac{2}{3}=\dfrac{1}{3}+\dfrac{1}{3}\)

\(\dfrac{15}{29}=\dfrac{1+14}{29}=\dfrac{1}{29}+\dfrac{14}{29}\)

\(\dfrac{9}{35}=\dfrac{1+8}{35}=\dfrac{1}{35}+\dfrac{8}{35}\)

\(\dfrac{16}{27}=\dfrac{2+14}{27}=\dfrac{2}{27}+\dfrac{14}{27}\)

thank

a) 7 / 15 = 1 / 15 + 6 / 15

b) 13/27=11 / 27 + 2 / 27

c) 3 /18 = 1 / 9 + 1 / 18

bn lm dr^-^

giúp mình với

7/12=1/12+6/12=1/12=1/2                                                                        = 7/12=2/12+5/12=1/6+5/12                                                                      =7/12=3/12+4/12=1/4+1/3                                                                                  bạn cũng có thể viết nhiều hơn nữa ..

\(\dfrac{7}{12}\) = \(\dfrac{1}{12}\) + \(\dfrac{1}{2}\)        

\(\dfrac{7}{12}\)  = \(\dfrac{1}{6}\) + \(\dfrac{5}{12}\)

\(\dfrac{7}{12}\) = \(\dfrac{1}{4}\) + \(\dfrac{1}{3}\) 

10/27: 1/27+7/27+2/27

13/12: 1/12+7/12+5/12

15/8:7/8+3/8+5/8

10/27 = 1/27+2/27+7/27

13/12 = 1/12+5/12+7/12

15/8 =  3/8+5/8+7/8

ko biết nữa tui gà lắm

\(\frac{13}{15}\) = \(\frac{1}{5}\) + \(\frac{2}{3}\) = \(\frac{2}{5}\) + \(\frac{7}{15}\) = \(\frac{1}{3}\) + \(\frac{8}{15}\) 

 \(\frac{23}{20}\) = \(\frac{9}{10}\) + \(\frac{1}{4}\) = \(\frac{1}{2}\) + \(\frac{13}{20}\) = \(\frac{1}{5}\) + \(\frac{19}{20}\) = \(\frac{3}{10}\) + \(\frac{17}{20}\) = ....

 Học tốt !

1/5 + 4/15