4/10=2/5

1/5<2/5

ok bạn nhé

a) 

\(\dfrac{6}{12}=\dfrac{6:6}{12:6}=\dfrac{1}{2}\)

\(\Rightarrow\dfrac{1}{2}=\dfrac{1\times2}{2\times2}=\dfrac{2}{4}\)

Mà \(\dfrac{2}{4}< \dfrac{3}{4}\)

Vậy \(\dfrac{6}{12}< \dfrac{3}{4}\).

b)

\(\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\)

Mà \(\dfrac{2}{5}< \dfrac{4}{5}\)

Vậy \(\dfrac{2}{5}< \dfrac{8}{10}\).

c)

\(\dfrac{40}{35}=\dfrac{40:5}{35:5}=\dfrac{8}{7}\)

Mà \(\dfrac{8}{7}>\dfrac{6}{7}\)

Vậy \(\dfrac{40}{35}>\dfrac{6}{7}\).

d)

\(\dfrac{8}{16}=\dfrac{8:8}{16:8}=\dfrac{1}{2}\)

Mà \(\dfrac{1}{2}< \dfrac{5}{2}\)

Vậy \(\dfrac{8}{16}< \dfrac{5}{2}\).

a) \(\dfrac{6}{14}=\dfrac{6:2}{14:2}=\dfrac{3}{7}\)

\(\dfrac{3}{7}< \dfrac{4}{7}\)

b) \(\dfrac{6}{15}=\dfrac{6:3}{15:3}=\dfrac{2}{5}\)

\(\dfrac{3}{5}>\dfrac{2}{5}\)

c) \(\dfrac{10}{18}=\dfrac{10:2}{18:2}=\dfrac{5}{9}\)

\(\dfrac{5}{9}>\dfrac{2}{9}\)

3/4 >2/4

\(\dfrac{6}{12}=\dfrac{6:3}{12:3}=\dfrac{2}{4}\)

\(\dfrac{3}{4}>\dfrac{2}{4}\)

3/4>2/4 nhá bạn 

Ta có \(\dfrac{8}{10}=\dfrac{4}{5}\)

Vì 2 < 4 nên \(\dfrac{2}{5}< \dfrac{4}{5}=\dfrac{8}{10}\)

Vậy \(\dfrac{2}{5}< \dfrac{8}{10}\)

`6/12=(6:3)/(12:3)=2/4`

có `2<3` nên `2/4<3/4`

`=> 6/12<3/4`

1+1=?

Bài 1: Quy đồng => so sánh => trả về phân số ban đầu

Bài 2: Như bài 1 

Bài 1

a) 4/3 < 1/3

b) 2/5 < 3/2

c) 7/2 > 1/4

d) 3/4 < 5/6

Bài 2

a) 6/10 = 3/5 và 4/5 vậy 3/5 < 4/5

b) 3/4 và 6/12 = 1/2 vậy 3/4 > 1/2

Giải cho mình cho mình với sáng mai mình phải nộp bài này rồi

6/10=3/5

3/5   <    4/5

\(\frac{6}{10}=\frac{3}{5}\);\(\frac{3}{5}<\frac{4}{5}\)

6/10=3/5;3/5<4/5