Question

-5                       -91

___    và           ____         So Sánh

 6                        104

Answer 1

\(-\dfrac{5}{6}=-\dfrac{5.104}{6.104}=-\dfrac{520}{624};-\dfrac{91}{104}=-\dfrac{91.6}{104.6}=-\dfrac{546}{624}\Rightarrow-\dfrac{5}{6}>-\dfrac{91}{104}\)

Answer 2

Ta có:

 \(\dfrac{-91}{104}\) rút gọn cho 13 được \(\dfrac{-7}{8}\)

→ \(\dfrac{-5}{6}=\dfrac{-5.4}{6.4}=\dfrac{-20}{24}\)

\(\dfrac{-7}{8}=\dfrac{-7.3}{8.3}=\dfrac{-21}{24}\)

Vì 20 < 21

nên \(\dfrac{-20}{24}>\dfrac{-21}{24}\) 

hay \(\dfrac{-5}{6}>\dfrac{-91}{104}\)

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