bằng 21

        __

        35 

nha em

\(\dfrac{210}{350}=\dfrac{210:70}{350:70}=\dfrac{3}{5}\)

#Hoctot

=3/5

196/210=14/15

tk m nhé

= 14/15 nha

14/15 nhe mk

a, =5/14

b, = 1/6

c, = 3/2

d, = 8/7

5/14

1/6

3/2

8/7

a,5/14

b,1/6

c,3/2

d,8/7

9/10

19/21

9/10

19/21

a.9/10

b.19/21

\(\frac{4}{12}=\frac{4:4}{12:4}=\frac{1}{3}\)

\(\frac{24}{30}=\frac{24:6}{30:6}=\frac{4}{5}\)

\(\frac{25}{100}=\frac{25:25}{100:25}=\frac{1}{4}\)

\(\frac{60}{80}=\frac{60:20}{80:20}=\frac{3}{4}\)

\(\frac{9}{18}=\frac{9:9}{18:9}=\frac{1}{2}\)

\(\frac{60}{36}=\frac{60:12}{36:12}=\frac{5}{3}\)

\(\frac{72}{54}=\frac{72:18}{54:18}=\frac{4}{3}\)

\(\frac{35}{210}=\frac{35:35}{210:35}=\frac{1}{6}\)

4/12=1/3

24/30=4/5

25/100=1/4

60/80=3/4

9/18=1/2

60/36=5/3

72/54=4/3

35/210=1/6

4/12 =1/3

24/30 =4/5

25/100 =1/4

\(\frac{57}{133}=\frac{57\div19}{133\div19}=\frac{3}{7}\)

\(\frac{189}{210}=\frac{189\div21}{210\div21}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{7676\div404}{8484\div404}=\frac{19}{21}\)

lần lượt = 3/7 ; 9/10 ; 19/21

Ta có :

\(\frac{57}{133}=\frac{57:19}{133:19}=\frac{3}{7}\)

\(\frac{189}{210}=\frac{189:21}{210:21}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{7676:404}{8484:404}=\frac{19}{21}\)

\(\frac{4}{12}=\frac{1}{3}\)              \(\frac{60}{36}=\frac{5}{3}\)             \(\frac{60}{80}=\frac{3}{4}\)

\(\frac{9}{18}=\frac{1}{2}\)             \(\frac{25}{100}=\frac{1}{4}\)              \(\frac{35}{210}=\frac{1}{6}\)

\(\frac{24}{30}=\frac{4}{5}\)             \(\frac{72}{54}=\frac{4}{3}\)

Bn tự làm đi,bn học rồi mà

4/12=1/3;9/18=1/2;24/30=4/5;60/36=5/3;25/100=1/4;72/54=4/3;60/80=3/4;35/210=1/6