Question

[Nguyễn Phương Mai]

So sánh các phân số sau: \(\frac{19}{20}\)và \(\frac{20}{21}\) \(\frac{89}{88}\)và\(\frac{90}{89}\) \(\frac{2005}{2003}và\frac{2003}{2001}\)

Answer 1

[Thao Nhi]

a)\(\frac{19}{20}+\frac{1}{20}=1\)

\(\frac{20}{21}+\frac{1}{21}=1\)

 vi \(\frac{1}{20}>\frac{1}{21}\) nen \(\frac{19}{20}<\frac{20}{21}\)

b) \(\frac{89}{88}-\frac{1}{88}=1\)

   \(\frac{90}{89}-\frac{1}{89}=1\)

vi \(\frac{1}{88}>\frac{1}{89}nen\frac{89}{88}>\frac{90}{89}\)

c)\(\frac{2005}{2003}-\frac{2}{2003}=1\)

   \(\frac{2003}{2001}-\frac{2}{2001}=1\)

vi \(\frac{2}{2003}<\frac{2}{2001}nen\frac{2005}{2003}<\frac{2003}{2001}\)

Answer 2

[Đỗ Gia Khánh]

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