28/42=2/3

60/135=4/9

288/180=8/5

`28/42 = (28:14)/(42:14) = 2/3`

`60/135 = (60:15)/(135 : 15)=4/9`

`288/180 = (288:36)/(180:36) = 8/5`

a ) 1 3 b ) 1 4 c ) − 1 3

d ) 1 2 e ) 1 4 f ) 3 5

g ) 2 3 h ) − 3 2

\(\dfrac{50}{60}=\dfrac{5}{6}\)
\(\dfrac{33}{11}=3\)
\(\dfrac{16}{60}=\dfrac{4}{15}\)
\(\dfrac{42}{22}=\dfrac{21}{11}\)

chia là gì z

50/60=5/6

33/11=3

16/60=4/15

42/22=21/11

HT ☘

6/9=2/3

6/24=1/4

48/96=1/2

42/98=3/7

2/3 ; 1/4 ; 1/2;3/7 cho **** nha bạn thương

6/9 = 2/3

6/24 = 1/4

48/96 = 1/2

42/98 = 3/7

\(\frac{48}{96}=\frac{48:48}{96:48}=\frac{1}{2}\)

\(\frac{42}{98}=\frac{42:14}{98:14}=\frac{3}{7}\)

\(\frac{80}{240}=\frac{80:80}{240:80}=\frac{1}{3}\)

\(\frac{75}{100}=\frac{75:25}{100:25}=\frac{3}{4}\)

\(\frac{64}{720}=\frac{64:16}{720:16}=\frac{4}{45}\)

\(\frac{15}{120}=\frac{15:15}{120:15}=\frac{1}{8}\)

48/96=1/2

42/98=3/7

80/240=1/3

75/100=3/4

64/720=4/45

15/120=1/8

48/96=1/2

42/98=3/7

80/240=1/3

75/100=3/4

64/720=4/45

15/120=1/8

`21/28=(21:7)/(28:7)=3/4`

`-42/54=(-42:6)/(54:6)=-7/9`

`35/-65=(35:5)(-65:5)=-7/13`

`-63/-99=63/99=(63:9)/(99:9)=7/11`

21/28 là phân số tối giản

-42/54 = -7/9

35/-65 = 7/-13

-63/-99 = -7/-11

\(\frac{15}{18}=\frac{5}{6}\); \(\frac{27}{135}=\frac{1}{5}\); \(\frac{28}{56}=\frac{1}{2}\)

\(\frac{15}{18}=\frac{5}{6}\)

\(\frac{27}{135}=\frac{1}{5}\)

\(\frac{28}{56}=\frac{1}{2}\)

Ta có  \(\frac{15}{18}=\frac{5}{6};\frac{27}{135}=\frac{1}{5};\frac{28}{56}=\frac{1}{2}\):

\(\dfrac{21}{28}=\dfrac{21:7}{28:7}=\dfrac{3}{4}\)

\(\dfrac{18}{54}=\dfrac{18:9}{54:9}=\dfrac{2}{6}=\dfrac{1}{3}\)

\(\dfrac{90}{72}=\dfrac{90:9}{72:9}=\dfrac{10}{8}=\dfrac{5}{4}\)

\(\dfrac{9}{36}=\dfrac{9:9}{36:9}=\dfrac{1}{4}\)

\(\dfrac{30}{48}=\dfrac{30:6}{48:6}=\dfrac{5}{8}\)

\(\dfrac{72}{42}=\dfrac{72:6}{42:6}=\dfrac{12}{7}\)