\(\dfrac{3}{9}=\dfrac{3:3}{9:3}=\dfrac{1}{3}\)

\(\dfrac{15}{27}=\dfrac{15:3}{27:3}=\dfrac{5}{9}\)

\(\dfrac{28}{20}=\dfrac{28:4}{20:4}=\dfrac{7}{5}\)

\(\dfrac{5}{105}=\dfrac{5:5}{105:5}=\dfrac{1}{21}\)

\(\dfrac{24}{39}=\dfrac{24:3}{39:3}=\dfrac{8}{13}\)

3/9=.....1/3

15/27=.....5/9

28/20=....7/5

5/105=.....1/21

24/39=.....8/13

1/3

5/9

7/5

1/21

8/13

\(a.\frac{36}{48}=\frac{36:12}{48:12}=\frac{3}{9}\)

\(b.\frac{54}{68}=\frac{54:2}{68:2}=\frac{27}{34}\)

\(c.\frac{105}{90}=\frac{105:15}{90:15}=\frac{7}{6}\)

\(d.\frac{5454}{6868}=\frac{5454:202}{6868:202}=\frac{27}{34}\)

a 36/48 = 3/4

54/68 = 27/34

105/90 = 7/6

5454/6868 = 27/34

a) 36/48 =3/4

b) 54/68 = 27/34

c) 105/90 = 7/6

d) 5454/6868 = 27/34

6/8 = 3/4 ; 39/65 = 3/5 ; 70/42 = 5/3 ; 84/231 = 4/11 ; 117117/504504 = 13/56 ; 7/35 = 1/5 ; 112/140 = 4/5 ; 165/110 = 3/2 ; 30/105 = 2/7 ; 153153/414414 = 17/46

6/8=3/4

35/44

35/44

tối giản rồi mà

Chọn D

trả lời :

\(\frac{45}{105}=\frac{15.3}{15.7}=\frac{3}{7}\)

chọn dáp án D nhà

Chúc bạn học tốt!

\(=\dfrac{19}{21}\)

mọi người giúp em với

105/790=21/158

105/790=21/158

21/158

51/68 = 51:17/68:17 = 3/4

Chúc bạn học tốt!! ^^

\(\dfrac{3}{4}\) nhé

\(\dfrac{51}{68}=\dfrac{51:17}{68:17}=\dfrac{3}{4}\)