Question

Rút gọn các phân số sau :

\(\frac{3}{9}\);       \(\frac{28}{40}\);          \(\frac{100}{200}\);   \(\frac{70}{75}\)

Answer 1

\(\frac{3}{9}=\frac{3:3}{9:3}=\frac{1}{3}\)

\(\frac{28}{40}=\frac{28:4}{40:4}=\frac{7}{10}\)

\(\frac{100}{200}=\frac{100:100}{200:100}=\frac{1}{2}\)

\(\frac{70}{75}=\frac{70:5}{75:5}=\frac{14}{15}\)

#hoctot

Answer 2

\(\frac{3}{9}=\frac{1}{3}\)

\(\frac{28}{40}=\frac{7}{10}\)

\(\frac{100}{200}=\frac{1}{2}\)

\(\frac{70}{75}=\frac{14}{15}\)

#Học tốt#

Answer 3

\(\frac{3}{9}=\frac{1}{3}\)

\(\frac{28}{40}=\frac{7}{10}\)

\(\frac{100}{200}=\frac{1}{2}\)

\(\frac{70}{75}=\frac{14}{15}\)

Chúc bạn học tốt nhé

Answer 4

Ta có :

+) \(\frac{3}{9}=\frac{3:3}{9:3}=\frac{1}{3}\)

+) \(\frac{28}{40}=\frac{28:4}{40:4}=\frac{7}{10}\)

+) \(\frac{100}{200}=\frac{100:100}{200:100}=\frac{1}{100}\)

+) \(\frac{70}{75}=\frac{705}{75:5}=\frac{14}{15}\)

_Chúc bạn học tốt_

Answer 5

\(\sqrt{\frac{3}{9}}\)=_{\(\sqrt{\frac{1}{3}}\)}

\(\sqrt{\frac{28}{40}}\)=\(\sqrt{\frac{7}{10}}\)

\(\sqrt{\frac{100}{200}}\)=\(\sqrt{\frac{1}{2}}\)

\(\sqrt{\frac{70}{75}}\)=\(\sqrt{\frac{14}{15}}\)

bạn 

Answer 6

\(\frac{3}{9}=\frac{3:3}{9:3}=\frac{1}{3}\)

\(\frac{28}{40}=\frac{28:4}{40:4}=\frac{7}{10}\)

\(\frac{100}{200}=\frac{100:100}{200:100}=\frac{1}{2}\)

\(\frac{70}{75}=\frac{70:5}{75:5}=\frac{14}{15}\)

Answer 7

\(\frac{3}{9}=\frac{1}{3}\)

\(\frac{28}{40}=\frac{7}{10}\)

\(\frac{100}{200}=\frac{1}{2}\)

\(\frac{70}{75}=\frac{14}{15}\)

Answer 8

\(\frac{3}{9}\)=\(\frac{3:3}{9:3}\)=\(\frac{1}{3}\)

\(\frac{28}{40}\)=\(\frac{28:4}{40:4}\)=\(\frac{7}{10}\)

\(\frac{100}{200}\)=\(\frac{100:100}{200:100}\)=\(\frac{1}{2}\)

\(\frac{70}{75}\)=\(\frac{70:5}{75:5}\)=\(\frac{14}{15}\)

Answer 9

3/9=3:3/9:3=1/3

28/40=28:4/40:4=7/10

100/200=100:100/200:100=1/2

70/75=70:5/75:5=14/15