Rút gọn phân số

\(\dfrac{18}{30}=\dfrac{3}{5};\dfrac{48}{96}=\dfrac{1}{2};\dfrac{64}{720}=\dfrac{4}{45};\dfrac{42}{98}=\dfrac{3}{7}\)

18/30 = 3/5

48/96 = 1/2

64/720 = 4/45

42/98 = 3/7

`51 / 27 = [ 51 : 3 ] / [27 : 3 ] = 17 / 9`

= 17/9

17/9 nha

3/4

7/9

3/4

7/9

\(\dfrac{45}{60}=\dfrac{45:15}{60:15}=\dfrac{3}{4}\)

\(\dfrac{28}{36}=\dfrac{28:4}{36:4}=\dfrac{7}{9}\)

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

4/3

3/4

3/5

4/3

3/4

3/5

=\(12.1.3.6\)

=\(12.3.6\)

=\(36.6\)

=\(216\)

\(^ofer\)

a) = 3/5 

b)2/3

c) 4/3

d) 7/5

a,3/5

b,2/3

c,4/3

d,7/5

a 3/5

b 2/3

c 4/3

d 7/5

7/19

7/4

7/5

a7/19

b7/4

c7/5

7/19

7/4

21/15

ko có đáp án

\(\dfrac{7}{8}\)

7/8

b)1/3

c)1/5

d)1/4

a, 1/3

b, 1/5

c, 1/4

1/3

1/5

1/4

4/7

12/21=12:3/21:3=4/7

4/7