\(\dfrac{2}{3};\dfrac{3}{4};\dfrac{5}{6};\dfrac{11}{12}\)

\(=\dfrac{70}{105};\dfrac{42}{105};\dfrac{30}{105};\dfrac{63}{105};\dfrac{45}{105};\dfrac{75}{105}\)

\(\dfrac{30}{105}< \dfrac{42}{105}< \dfrac{45}{105}< \dfrac{63}{105}< \dfrac{70}{105}< \dfrac{75}{105}\) hay \(\dfrac{2}{7}< \dfrac{2}{5}< \dfrac{3}{7}< \dfrac{3}{5}< \dfrac{2}{3}< \dfrac{5}{7}\)

2/7

2/5

3/7

3/5

2/3

5/7

\(\dfrac{70}{105};\dfrac{42}{105};\dfrac{30}{105};\dfrac{63}{105};\dfrac{45}{105};\dfrac{75}{105}\)

\(\dfrac{30}{105}< \dfrac{42}{105}< \dfrac{45}{105}< \dfrac{63}{105}< \dfrac{70}{105}< \dfrac{75}{105}\)

Nên ta có : \(\dfrac{2}{7};\dfrac{2}{5};\dfrac{3}{7};\dfrac{3}{5};\dfrac{2}{3};\dfrac{5}{7}.\)

Không cần trả lời chi tiết đâu

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

2: \(5m^28dm^2=50800cm^2\)

3: Độ dài đáy là 3/8:3/8=1m

1: \(\dfrac{4}{7}< \dfrac{5}{7}< \dfrac{3}{3}< \dfrac{5}{4}\)

\(\dfrac{1}{3};\dfrac{2}{7};\dfrac{1}{4}\)

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

12/7 , 3/2

12 / 7 , 3 / 2

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