Câu 6.
a) $\frac{-2}{3}$ và $\frac{1}{200}$
- $\frac{-2}{3}$ = $\frac{-400}{600}$
- $\frac{1}{200}$ = $\frac{3}{600}$
Có: $\frac{-400}{600}$ < $\frac{3}{600}$
=> $\frac{-2}{3}$ < $\frac{1}{200}$
b) $\frac{139}{138}$ và $\frac{1375}{1376}$
- $\frac{139}{138}$ > 1
- $\frac{1375}{1376}$ < 1
=> $\frac{139}{138}$ > $\frac{1375}{1376}$
c) $\frac{-11}{33}$ và $\frac{25}{-76}$
- $\frac{-11}{33}$ = $\frac{-1}{3}$ = $\frac{-76}{228}$
- $\frac{25}{-76}$ = $\frac{-75}{228}$
Có: $\frac{-76}{228}$ < $\frac{-75}{228}$
=> $\frac{-11}{33}$ < $\frac{25}{-76}$