(1) \(\frac{2002}{2003}\)và \(\frac{145}{146}\)
Ta có: \(1-\frac{2002}{2003}=\frac{1}{2003}\); \(1-\frac{145}{146}=\frac{1}{145}\)
Vì \(\frac{1}{2003}< \frac{1}{146}\Rightarrow-\frac{1}{2003}>-\frac{1}{146}\)
\(\Rightarrow1-\frac{1}{2003}>1-\frac{1}{146}\)\(\Rightarrow\frac{2002}{2003}>\frac{145}{146}\)
Vậy \(\frac{2002}{2003}>\frac{145}{146}\)
(2) \(\frac{2012}{2013}\)và \(\frac{2012}{2015}\)
Vì: \(2013< 2015\Rightarrow\frac{2012}{2013}>\frac{2012}{2015}\)
Vậy: \(\frac{2012}{2013}>\frac{2012}{2015}\)
(3) \(\frac{159}{163}\) và \(\frac{374}{371}\)
Vì \(\frac{159}{163}< 1\)và \(\frac{374}{371}>1\)
Nên \(\frac{374}{371}>\frac{159}{163}\)
Vậy \(\frac{374}{371}>\frac{159}{163}\)
(4) \(\frac{50}{110}\)và \(\frac{65}{120}\)
Ta có: \(\frac{50}{110}< \frac{50}{100}=\frac{1}{2}\) và \(\frac{65}{120}>\frac{60}{120}=\frac{1}{2}\)
\(\Rightarrow\frac{50}{110}< \frac{65}{120}\)
Vậy \(\frac{50}{110}< \frac{65}{120}\)
(5) \(\frac{127}{139}\)và \(\frac{130}{134}\)
Ta có: \(\frac{127}{139}< \frac{127}{134}< \frac{130}{134}\)
\(\Rightarrow\frac{127}{139}< \frac{130}{134}\)
Vậy \(\frac{127}{139}< \frac{130}{134}\)
\(2013< 2015\Rightarrow\frac{2012}{2013}>\frac{2012}{2015}\)\(2013< 2015\Rightarrow\frac{2012}{2013}>\frac{2012}{2015}\)
Cái dòng cuối bị thừa nha bạn, nhấn nhầm rồi máy nó nhảy
a) 2002/2003 > 145/146
b) 2013/2012 >2012/2015
c) 374/371 > 159/163
d) 50/110 < 65/120
e) 127/139 < 130/134
