\(=>\dfrac{1}{6}< \dfrac{2}{3}< \dfrac{5}{5}< \dfrac{5}{4}< \dfrac{19}{12}\)

a,\(\dfrac{1}{6},\dfrac{2}{3},\dfrac{5}{5},\dfrac{5}{4},\dfrac{19}{12}\)

b,\(\dfrac{8}{11}\)\(x=\dfrac{1}{5}\)

\(x=\dfrac{1}{5}:\dfrac{8}{11}\)

\(x=\dfrac{11}{40}\)

\(\dfrac{8}{11}xX=\dfrac{1}{5}=>X=\dfrac{1}{5}:\dfrac{8}{11}=>X=\dfrac{11}{40}\)

\(\dfrac{12}{11};\dfrac{6}{5};\dfrac{5}{4};\dfrac{4}{3};\dfrac{3}{2}\)

\(\dfrac{-11}{4}\); \(\dfrac{-7}{3}\); \(\dfrac{3}{5}\)

-3/6, 2/3 (18/27), 1 (12/12), 7/4, 2 (8/4), 11/5

Quy đồng các phân số đã cho lên, ta được:

\(\dfrac{3}{4}=\dfrac{3\times42}{4\times42}=\dfrac{126}{168}\)

\(\dfrac{5}{6}=\dfrac{5\times28}{6\times28}=\dfrac{140}{168}\)

\(\dfrac{11}{8}=\dfrac{11\times21}{8\times21}=\dfrac{231}{168}\)

\(\dfrac{8}{7}=\dfrac{8\times24}{7\times24}=\dfrac{192}{168}\)

\(5=\dfrac{5}{1}=\dfrac{5\times168}{1\times168}=\dfrac{840}{168}\)

Mà \(\dfrac{840}{168}>\dfrac{231}{168}>\dfrac{192}{168}>\dfrac{140}{168}>\dfrac{126}{168}\)

Vậy ta sắp xếp được các phân số theo thứ tự tăng dần là: \(\dfrac{3}{4};\dfrac{5}{6};\dfrac{8}{7};\dfrac{11}{8};5\).

`3/4 ; 5/6 ; 8/7 ; 11/8 ; 5`

`#` `\text{dkhanhqlv}`

Ta có :

`3/4<1`

`5/6<1`

`11/8>1`

`8/7>1`

`5>1`

`11/8=385/280`

`8/7=320/280`

`5=1400/280`

`=>3/4<5/6<8/7<11/8<5`

\(\dfrac{1}{2};\dfrac{2}{3};\dfrac{3}{4};\dfrac{4}{5};\dfrac{5}{6};\dfrac{6}{7};\dfrac{7}{8};\dfrac{8}{9};\dfrac{9}{10}\)

Sắp xếp các phân số sau theo thứ tự tăng dần :

\(\dfrac{1}{2}\);\(\dfrac{2}{3}\);\(\dfrac{3}{4}\);\(\dfrac{4}{5}\);\(\dfrac{5}{6}\);\(\dfrac{6}{7}\);\(\dfrac{7}{8}\);\(\dfrac{8}{9}\);\(\dfrac{9}{10}\)

1/2

3/3

3/4

4/5

5/6

7/8

8/9

9/10