25,9/15,9/11,25/7/6

\(\dfrac{1}{3};\dfrac{1}{5};\dfrac{3}{10}=\dfrac{10}{30};\dfrac{6}{30};\dfrac{9}{30}\)

\(\dfrac{1}{2};\dfrac{11}{14};\dfrac{6}{7}\)

\(\dfrac{13}{15};\dfrac{5}{6};\dfrac{4}{5}\)

Bé đến lớn :: 7/9  ,   5/6   ,    5/4      ,     21/5

Lớn đến bé : 3/2   ,   5/4   ,   7/10     ,     3/5

1/5=3/15

9/5=27/15

Do đó: 1/5<7/15<11/15<9/5

dễ mà em :v

6/15; 12/15; 7/7; 13/6

6/15->12/15->7/7->13/6

6/15>12/15>7/7>13/6

Ta có:

\(\frac{4}{5}=\frac{576}{720}\)

\(\frac{9}{15}=\frac{432}{720}\)

\(\frac{9}{8}=\frac{810}{720}\)

\(\frac{8}{9}=\frac{640}{720}\)

Vì \(432< 576< 640< 810\)

\(\Rightarrow\frac{432}{720}< \frac{576}{720}< \frac{640}{720}< \frac{810}{720}\)

\(\Rightarrow\frac{9}{15}< \frac{4}{5}< \frac{8}{9}< \frac{9}{8}\)

HOK TOT

7/7 ; 1/7 ; 6/5; 5/2

1/7 ; 7/7 ; 6/5 ; 5/2

1/7 ; 7/7 ; 6/5 ; 5/2

\(\frac{5}{7};\frac{7}{6};\frac{7}{6};\frac{7}{5}\)

\(\dfrac{8}{3};\dfrac{7}{7};\dfrac{6}{7};\dfrac{1}{2};\dfrac{3}{8}\)

\(\dfrac{8}{3}\);\(\dfrac{7}{7}\);\(\dfrac{6}{7}\);\(\dfrac{1}{2}\);\(\dfrac{3}{8}\)

chúc bạn học tốt