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A, 12/5 va 5/2
= 24/10 va 25/10
=> 24/10 < 25/10 hay 12/5 < 5/2
B, 6/15 va 3/8
= 48/120 va 45/120
=> 48/120 > 45/120 hay 6/15 > 3/8
C, 17/8 va 18/4
= 17/8 va 36/8
=> 17/8 < 38/8 hay 17/8 < 18/4
D, 24/23 va 23/22
= 528/506 va 529/506
=> 528/506 < 529/506 hay 24/23 < 23/22
![](https://rs.olm.vn/images/avt/0.png?1311)
a)12/5<5/2
b)6/15>3/8
c)\(\frac{17}{18}<\frac{18}{19}\)
d) \(\frac{24}{23}\) < \(\frac{23}{22}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
b, \(\dfrac{7}{13}\) và \(\dfrac{17}{23}\)
\(\dfrac{7}{13}\) < \(\dfrac{7+10}{13+10}\) = \(\dfrac{17}{23}\)
Vậy \(\dfrac{7}{13}\) < \(\dfrac{17}{23}\)
\(\dfrac{12}{48}\) = \(\dfrac{12:12}{48:12}\) = \(\dfrac{1}{4}\)
\(\dfrac{13}{47}\) > \(\dfrac{13}{52}\) = \(\dfrac{13:13}{52:13}\) = \(\dfrac{1}{4}\)
Vậy \(\dfrac{12}{48}\) < \(\dfrac{13}{47}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: 23/22 = \(1\frac{1}{22}\)= 1+1/22
24/23 = \(1\frac{1}{23}\)=1+1/23
Vì 1/22 > 1/23
Nên \(1\frac{1}{22}>1\frac{1}{23}\)
Vậy 23/22>24/23
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{24}{23}=1+\frac{1}{23}\)
\(\frac{23}{22}=1+\frac{1}{22}\)
Vì \(\frac{1}{23}< \frac{1}{22}\Rightarrow\frac{23}{22}< \frac{24}{23}\)
tìm phần bù đi em