`6/10=3/5`

`70/9=70/9`

`96/72=4/3`

`45/35=9/7`

`24/36=2/3`

`25/100=1/4`

$6/10=(6:2)/(10:2)=3/5$

$70/9$ ( tối giản)

$96/72=(96:24)/972:24)=4/3$

$45/35=(45:5)/(35:5)=9/7$

$24/36=(24:12)/(36:12)=2/3$

$25/100=(25:25)/(100:25)=1/4$

a ) 5 7 b ) − 2 3 c ) 3 5

d ) − 1 3 e ) − 5 6 f ) 10

20/45 = 4/9

14/35 = 2/7

-32/44 = -8/11

Chúc bạn học tốt !!!  :)))

Đáp án : 

\(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)

\(\frac{14}{35}=\frac{14:7}{35:7}=\frac{2}{5}\)

\(\frac{-32}{44}=\frac{-32:4}{44:4}=\frac{-8}{11}\)

Hok tốt

\(=\dfrac{3}{5}\\ =\dfrac{7}{9}\\ =\dfrac{4}{3}\\ =\dfrac{9}{7}\)

\(\dfrac{6}{10}=\dfrac{3}{5};\dfrac{70}{90}=\dfrac{7}{9};\dfrac{96}{72}=\dfrac{8}{9};\dfrac{45}{35}=\dfrac{9}{7}\)

Rút gọn:

\(\frac{35}{45}=\frac{35}{45}:\frac{5}{5}=\frac{7}{9}\)

HT

35/45 = 35 : 5 / 45 : 5 = 7/9 nhé

https://olm.vn/hoi-dap/question/1037641.html

Rút gọn các phân số sau :

\(\frac{18}{30}=\frac{18\div6}{30\div6}=\frac{3}{5}\)

\(\frac{64}{80}=\frac{64\div16}{80\div16}=\frac{4}{5}\)

\(\frac{36}{27}=\frac{36\div9}{27\div9}=\frac{4}{3}\)

\(\frac{45}{35}=\frac{45\div5}{35\div5}=\frac{9}{7}\)

\(\dfrac{6}{10}=\dfrac{3}{5};\dfrac{70}{90}=\dfrac{7}{9};\)\(\dfrac{96}{72}=\dfrac{4}{3}\)\(\dfrac{45}{35}=\dfrac{9}{7}\)

\(\dfrac{6}{10}=\dfrac{3}{5};\dfrac{70}{90}=\dfrac{7}{9};\dfrac{96}{72}=\dfrac{4}{3};\dfrac{45}{35}=\dfrac{9}{7}\)

\(\dfrac{45}{63}=\dfrac{45:9}{63:9}=\dfrac{5}{7}\)

`45/63 = (5xx9)/(7xx9) = 5/7`

=> Chọn `D`