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

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

-5/8=-15/24=-30/48

-9/16=-27/48

-2/3=-32/48

-7/12=-28/48

=>-2/3<-5/8<-7/12<-9/16

a) Ta có:

\(\dfrac{7}{11}=0,\left(63\right)\)

\(\dfrac{8}{-13}=-0,\left(615384\right)\)

\(\dfrac{37}{19}\approx1,95\)

\(\dfrac{-5}{13}=-0,\left(384615\right)\)

\(\Rightarrow-0,\left(615384\right)< -0,\left(384615\right)< 0< 0,\left(63\right)< 1,95\)

\(\Rightarrow\dfrac{8}{-13}< \dfrac{-5}{13}< 0< \dfrac{7}{11}< \dfrac{37}{19}\)

b) Ta có:

\(\dfrac{-9}{17}\approx-0,53\)

\(-\dfrac{6}{5}=-1,2\)

\(\dfrac{7}{-17}\approx-0,41\)

\(\Rightarrow-3,4< -1,2< -1,02< -0,53< -0,41< 0\)

\(\Rightarrow-3,4< -\dfrac{6}{5}< -1,02< \dfrac{-9}{17}< \dfrac{7}{-17}< 0\)

a: 0<7/11

7/11<1

1=19/19<37/19

=>0<7/11<37/19

mà -8/13<-5/13<0

nên -8/13<-5/13<0<7/11<37/19

b: -1<-9/17<-7/17<0

-3,4<-1,2=-6/5<-1,02<-1

Do đó: -3,4<-6/5<-1,02<-1<-9/17<-7/17<0

Sắp xếp theo thứ tự từ bé đến lớn 

9/5;1/6;15/7

sắp xếp các PS theo thứ tự tăng dần 35/71,85/13,35/73,79/13,29/13

4/7<5/8<3/4<5/6<6/7<8/9<5/5

Tương tự 3. HS tự làm

-7/4<-1

-1<-6/7

=>-7/4<-6/7

8/13<8/12

=>8/13<2/3

2/3<1

1<7/5

=>2/3<7/5

=>8/13<2/3<7/5

-7/4<-6/7

0<8/13<2/3<7/5

=>-7/4<-6/7<0<8/13<2/3<7/5