\(\frac{17}{34}=\frac{1}{2}\), \(\frac{60}{70}=\frac{6}{7}\),\(\frac{126}{255}=\frac{42}{85}\),\(\frac{24}{72}=\frac{1}{3}\), \(\frac{105}{30}=\frac{7}{2}\), \(\frac{78}{56}=\frac{39}{28}\)

\(\frac{1}{2},\frac{6}{7},\frac{42}{85},\frac{1}{3},\frac{7}{2},\frac{39}{28}\)

k mk mk kb

17/34 = 1/2 ; 60/70 = 6/7 ; 126/255 = 42/85 ; 24/72 = 1/3 ; 105/30 = 7/2 ; 78/56 = 39/28

Bài 1: 

18/27=2/3

35/25=7/5

54/72=3/4

78/66=13/11

92/100=23/25

75/125=3/5

126/165=42/55

150/300=1/2

1717/1515=17/15

2/3       

 7/5  

3/4

13/11

23/25

3/5

42/55

1/2

17/15

\(\dfrac{72\times75}{125\times108}\) = \(\dfrac{36\times2\times25\times3}{25\times5\times36\times3}\) = \(\dfrac{2}{5}\)

a) 

 Số 3672 chia hết cho 9

 Số 250 chia hết cho 2 và 5

b) \(\frac{72}{96}=\frac{3}{4}\)           \(\frac{78}{42}=\frac{13}{7}\)

a, 1)3672

2)2510,2520,2530,2540,2550,2560,2570,2580,2590

b,1)3/4

2)13/7

a) 

- Số 3672 chia hết cho 9

- Số 250 chia hết cho 2 và 5 

b)

72/96 = 3/4                                            78/42 = 13/7

Tk mnha !!!!!!

5/6

5/6

\(\dfrac{5}{6}\)

\(\frac{72}{96}=\frac{72\div24}{96\div24}=\frac{3}{4}\)

72/96 = 72 : 24 / 96 : 24 = 3/4

 lưu ý: 

/ : là ngăn cách phân số 

: chia 

=3/4 ((((((:

`72/84 = (72:12)/(84:12) = 6/7`

`72/84=(72:12)/(84:12)=6/7`

72/84=6/7