\(\dfrac{-4}{35}\)

-4/35

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

\(\dfrac{64}{48}=\dfrac{4}{3};\dfrac{75}{100}=\dfrac{3}{4};\dfrac{210}{350}=\dfrac{3}{5}\)

4/3

3/4

3/5

4/3

3/4

3/5

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

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

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

lần lượt = 3/7 ; 9/10 ; 19/21

Ta có :

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

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

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

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