\(\dfrac{14}{21}=\dfrac{2}{3}\\ \dfrac{12}{15}=\dfrac{8}{10}\\ \dfrac{5}{7}=\dfrac{20}{28}\\ \dfrac{18}{33}=\dfrac{6}{11}\)

a,       5/4 , 14/21 , 12/15 , 5/7 , 18/33                                                                         

  b,       20/28 ,  15/12 , 6/11 , 2/3 , 8/10   

14/21=2/3

20/28=5/7

18/33=6/11

Trả lời ;

Đó là : 2/10 ;20/100 ; 200/1000

~ HT ~

2/10;20/100;200/1000

trl:

5/10; 50/100; 500/1000

Hc tốt!

2015:)))

3 số thập phân 

a) \(\frac{9}{10}\) \(\frac{12}{10}\)và \(\frac{15}{10}\)

b) \(\frac{3}{10}\)\(\frac{3}{100}\)và \(\frac{3}{1000}\)

a,9/10;12/10;15/10

b,3/10;3/100;3/1000

18/5 ; 24/5 ; 27/5

26/5 ; 26/7 ; 26/8

5/10;50/100;500/1000

1/10

2/100

3/1000

xin tiick

\(\frac{7}{10}\); \(\frac{7}{100}\); \(\frac{7}{1000}\)

1/2 = 25/100 + 250/1000

\(\dfrac{1}{2}=\dfrac{1000}{2000}=\dfrac{200}{2000}+\dfrac{800}{2000}=\dfrac{1}{10}+\dfrac{2}{5}\)

1,\(\frac{2,3}{4,4};\frac{3,4}{4,4};\frac{4,5}{4,4}\)

2,\(\frac{12,3}{2,1};\frac{12,3}{3,2};\frac{12,3}{4,3}\)

3,\(\frac{1,1}{2,3};\frac{2,1}{3,4};\frac{3,1}{4,5}\)

Tk nha.

1/2 = 1/6 + 1/3

25/100+1/4

\(\frac{1}{2}=\frac{1}{3}+\frac{1}{6}\)

\(\frac{1}{2}=\frac{1}{6}+\frac{1}{3}\)

25/100+1/4