a)17/200>17/314

b)11/54=22/108<22/37

c)141/893=3/19;159/901=3/17 nên 141/893<159/901

Kết bn với mik nha!

Bài 2: -25<-13<-7<9<10<14<20<30<42

=>\(-\frac{25}{19}<-\frac{13}{19}<-\frac{7}{19}<\frac{9}{19}<\frac{10}{19}<\frac{14}{19}<\frac{20}{19}<\frac{30}{19}<\frac{42}{19}\)

Bài 1:

a: 200<314

=>\(\frac{17}{200}>\frac{17}{314}\)

b: \(\frac{11}{54}=\frac{11\times2}{54\times2}=\frac{22}{108}<\frac{22}{37}\)

a: 17/200>17/314

b: 11/54=22/108<22/37

c: 141/893=3/19

159/901=3/17

mà 3/19<3/17

nên 141/893<159/901

17/200>17/314

11/54<22/37

141/893<159/901

17/200>17/314

11/54<22/37

141/893<159/901

a: 14/21=2/3=4/6

60/72=5/6

mà 4<5

nên 14/21<60/72

b: 38/133=2/7=16/56

129/344=3/8=21/56

mà 16<21

nên 38/133<129/344

\(\dfrac{14}{21};\dfrac{60}{72}\)

\(\dfrac{60}{72}=\dfrac{5}{6}=\dfrac{5\cdot21}{6\cdot21}=\dfrac{105}{126}\)

\(\dfrac{14}{21}=\dfrac{14\cdot6}{21\cdot6}=\dfrac{84}{126}\)

\(\dfrac{84}{123}< \dfrac{105}{126}\Rightarrow\dfrac{14}{21}< \dfrac{60}{72}\)

\(\dfrac{38}{133};\dfrac{129}{344}\)

\(\dfrac{38}{133}=\dfrac{19}{7}=\dfrac{19\cdot8}{7\cdot8}=\dfrac{152}{56}\)

\(\dfrac{129}{344}=\dfrac{3}{8}=\dfrac{3\cdot7}{8\cdot7}=\dfrac{21}{56}\)

\(\dfrac{152}{56}>\dfrac{21}{56}\Rightarrow\dfrac{38}{133}>\dfrac{129}{344}\)

a)    \(\frac{14}{21}=\frac{2}{3}=\frac{4}{6}\)

       \(\frac{60}{72}=\frac{5}{6}\)

Vì   \(\frac{4}{6}< \frac{5}{6}\)

nên       \(\frac{4}{21}< \frac{60}{72}\)

Ko so sánh bằng cách này đc đâu