Sắp xếp các phân số 1 /2 3/48, 8/12, 5/6 ,7/12 theo thứ tự từ bé đến lớn:
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\(\dfrac{1}{2}=\dfrac{1\cdot24}{2\cdot24}=\dfrac{24}{48}\)
\(\dfrac{3}{48}=\dfrac{3\cdot1}{48\cdot1}=\dfrac{3}{48}\)
\(\dfrac{8}{12}=\dfrac{8\cdot4}{12\cdot4}=\dfrac{32}{48}\)
\(\dfrac{5}{6}=\dfrac{5\cdot8}{6\cdot8}=\dfrac{40}{48}\)
\(\dfrac{7}{12}=\dfrac{7\cdot4}{12\cdot4}=\dfrac{28}{48}\)
mà 3<24<28<32<40
nên \(\dfrac{3}{48}< \dfrac{1}{2}< \dfrac{7}{12}< \dfrac{8}{12}< \dfrac{5}{6}\)
a: -10/8<-1
-19/19=-1
-1<-2/10<0
0<5/12<1<17/15
=>17/15>1>5/12>-2/10>-19/19>-10/8
b: -1/3=-4/12; -5/12=-5/12; -3/4=-9/12; -1/4=-3/12; -7/12=-7/12
=>-3/4<-7/12<-5/12<-1/3<-1/4
=> 5/6; 4/5; 2/3; 7/12; 1/2
1/2 ; 4/5 ; 2/3 ; 5/6 ; 7/12
Khi quy đồng ta có: 30/60; 48/60; 40/60; 50/60; 35/60
phân số có mẫu là `24` :
`-5/6=(-5xx4)/(6xx4)=-20/24`
`3/(-8) =-8/3=(-8xx8)/(3xx8)=-64/24`
`7/12=(7xx2)/(12xx2)=14/24`
`-25/100= -1/4= -6/24`
`72/108=2/3=16/24`
`10/60=1/6=4/24`
từ bé đến lớn là : `3/(-8) ; -5/6 ;-25/100; 10/60;72/108; 7/12`
-5/6=-20/24
-3/8=-9/24
7/12=14/24
-25/100=-1/4=-6/24
72/108=2/3=16/24
10/60=1/6=4/24
Ta có:
\(\dfrac{6}{5}=\dfrac{6\times168}{5\times168}=\dfrac{1008}{840}\) ; \(\dfrac{3}{4}=\dfrac{3\times210}{4\times210}=\dfrac{630}{840}\) ; \(\dfrac{9}{8}=\dfrac{9\times105}{8\times105}=\dfrac{945}{840}\)
\(\dfrac{1}{7}=\dfrac{1\times120}{7\times120}=\dfrac{120}{840}\) ; \(\dfrac{2}{3}=\dfrac{2\times280}{3\times280}=\dfrac{560}{840}\)
⇒ \(\dfrac{120}{840}< \dfrac{560}{840}< \dfrac{630}{840}< \dfrac{945}{840}< \dfrac{1008}{840}\) ⇒ \(\dfrac{1}{7}< \dfrac{2}{3}< \)\(\dfrac{3}{4}< \dfrac{9}{8}< \dfrac{6}{5}\)
\(\dfrac{8}{3};\dfrac{7}{7};\dfrac{6}{7};\dfrac{1}{2};\dfrac{3}{8}\)
\(\dfrac{8}{3}\);\(\dfrac{7}{7}\);\(\dfrac{6}{7}\);\(\dfrac{1}{2}\);\(\dfrac{3}{8}\)
chúc bạn học tốt
3/48,1/2;7/12;8/12;5/6
3/48, 1/2, 7/12, 8/12, 5/6
hk tốt