a,Sắp xếp: \(\dfrac{8}{45};\dfrac{4}{15};\dfrac{7}{15};\dfrac{3}{5}\)

b,Sắp xếp:\(\dfrac{3}{8};\dfrac{4}{5};\dfrac{47}{40};\dfrac{9}{4}\)

a: \(\dfrac{4}{15}=\dfrac{12}{45}\)

\(\dfrac{3}{5}=\dfrac{27}{45}\)

\(\dfrac{8}{45}=\dfrac{8}{45}\)

\(\dfrac{7}{15}=\dfrac{21}{45}\)

Do đó: \(\dfrac{8}{45}< \dfrac{4}{15}< \dfrac{7}{15}< \dfrac{3}{5}\)

a)\(\dfrac{8}{15}< \dfrac{11}{15}< \dfrac{15}{15}< \dfrac{16}{15}< \dfrac{17}{15}< \dfrac{19}{15}\)

b)\(\dfrac{19}{42}< \dfrac{19}{35}< \dfrac{19}{21}< \dfrac{19}{19}< \dfrac{19}{17}\)

c)\(\dfrac{8}{10}< \dfrac{6}{7}< \dfrac{27}{25}< \dfrac{16}{14}\)

a) 8/15 ;  11/15 ; 15/15 ; 16/15 ; 17/15 ; 19/15

b) 19/42 19/35 ; 19/21 ; 19/19 ; 19/17

c) 8/10 ; 6/7 ; 27/25 ; 16/14

15/6; 15/8; 11/13; 9/13

Ta có: \(\dfrac{5}{19}\)< \(\dfrac{7}{19}\)<  \(\dfrac{15}{19}\) <\(\dfrac{17}{19}\)

a) Các phân số sắp xếp theo thứ tự từ bé đến lớn: \(\dfrac{5}{19}\); \(\dfrac{7}{19}\); \(\dfrac{15}{19}\); \(\dfrac{17}{19}\)

b) Các phân số sắp xếp theo thứ tự từ lớn đến bé:  \(\dfrac{17}{19}\); \(\dfrac{15}{19}\);  \(\dfrac{7}{19}\); \(\dfrac{5}{19}\)

a) \(\dfrac{5}{19};\dfrac{7}{19};\dfrac{17}{19};\dfrac{15}{19}\)

b) \(\dfrac{15}{19};\dfrac{17}{19};\dfrac{7}{19};\dfrac{5}{19}\)

a, 9; 7; 5; 2

b, 1; 6; 4; 8

a) 9, 7, 5 2

b) 1, 4, 6, 8

a. 9-7-5-2

b. 1-4-6-8

3/4   1/2   3/7

3/4 1/2 

\(\dfrac{3}{7},\dfrac{2}{3},\dfrac{12}{12},\dfrac{7}{6}\)

các số từ bé đấn lớn là

\(\dfrac{3}{7};\dfrac{2}{3};\dfrac{12}{12};\dfrac{7}{6}\)

Đáp án là D

a. \(\dfrac{18}{25};\dfrac{25}{25};\dfrac{49}{25}\)

Mình làm trước câu a

a)\(\dfrac{18}{25}< \dfrac{25}{25}< \dfrac{49}{25}\)

b)\(\dfrac{89}{90}< \dfrac{110}{110}< \dfrac{4}{3}\)

c)\(\dfrac{1}{100}< \dfrac{3}{100}< \dfrac{46}{100}< \dfrac{49}{100}< \dfrac{103}{100}< \dfrac{110}{100}\)