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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
12/45=4/15=16/60;
35/60=35/60
12/24=1/2=30/60
6/15=2/5=24/60
12/15=48/60
=>12/45<6/15<12/24<35/60<12/15<8/7
có 3/4 à 4/5<1
5/5=1
7/6 và 8/7>1
mà 3/4<4/5
8/7<7/6
=> ta xếp được: 3/4;4/5;5/5;8/7;7/6
K mk nhé
\(\dfrac{1}{2}=\dfrac{1\cdot24}{2\cdot24}=\dfrac{24}{48}\)
\(\dfrac{3}{48}=\dfrac{3\cdot1}{48\cdot1}=\dfrac{3}{48}\)
\(\dfrac{8}{12}=\dfrac{8\cdot4}{12\cdot4}=\dfrac{32}{48}\)
\(\dfrac{5}{6}=\dfrac{5\cdot8}{6\cdot8}=\dfrac{40}{48}\)
\(\dfrac{7}{12}=\dfrac{7\cdot4}{12\cdot4}=\dfrac{28}{48}\)
mà 3<24<28<32<40
nên \(\dfrac{3}{48}< \dfrac{1}{2}< \dfrac{7}{12}< \dfrac{8}{12}< \dfrac{5}{6}\)
a) \(\dfrac{2}{3}=\dfrac{4}{6}\)
\(\dfrac{5}{6}=\dfrac{5}{6}\)
Do đó: \(\dfrac{2}{3}< \dfrac{5}{6}\)
mà \(\dfrac{5}{6}< 1< \dfrac{8}{7}\)
nên \(\dfrac{2}{3}< \dfrac{5}{6}< \dfrac{8}{7}\)