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\(\frac{20152015}{20162016}+\frac{20162016}{20162016}\)
\(=\frac{2015\times10001}{2016\times10001}+\frac{2016\times10001}{2016\times10001}\)
\(=\frac{2015}{2016}+\frac{2016}{2016}\)
\(=\frac{4031}{2016}\)
a, QUY ĐỒNG PHÂN SỐ :
MSC=280
\(\frac{2}{5}\)\(=\)\(\frac{112}{280}\)
\(\frac{4}{7}\)\(=\)\(\frac{160}{280}\)
\(\frac{5}{8}\)\(=\)\(\frac{175}{280}\)
mà \(\frac{112}{280}\)\(< \)\(\frac{160}{280}\)\(< \)\(\frac{175}{280}\)\(=>\)\(\frac{2}{5}\)\(< \)\(\frac{4}{7}\)\(< \)\(\frac{5}{8}\)
k cho anh nha anh mỏi tay quá lên chỉ làm dc câu a tý làm câu b sau
a) \(\frac{999}{10000}=\frac{99,9}{1000}>\frac{99}{100}\)
=> kết luận
b) \(1-\frac{97}{99}=\frac{2}{99}>1-\frac{98}{100}=\frac{2}{100}\)
\(\Rightarrow\frac{97}{99}< \frac{98}{100}\)
=> kết luận
Ta có : \(\frac{45}{65}=\frac{9}{13};\frac{48}{52}=\frac{12}{13};\frac{1010}{1313}=\frac{10}{13}\)
\(=>\frac{9}{13}< \frac{10}{13}< \frac{12}{13}\)
a) Ta có: \(A=\frac{3535.232323}{353535.2323}=\frac{35.101.23.10101}{35.10101.23.101}=\frac{35}{23}\)
\(B=\frac{3535}{3434}=\frac{35.101}{34.101}=\frac{35}{34}\)
\(C=\frac{2323}{2322}=\frac{2323}{2322}\)
\(\frac{20132013}{20152015}=\frac{20132013:10001}{20152015:10001}=\frac{2013}{2015}=1-\frac{2}{2015}\)
\(\frac{20152015}{20172017}=\frac{20152015:10001}{20172017:10001}=\frac{2015}{2017}=1-\frac{1}{2017}\)
\(1-\frac{1}{2015}<1-\frac{1}{2017}\Rightarrow\frac{20132013}{20152015}<\frac{20152015}{20172017}\)
vậy \(\frac{20132013}{20152015}<\frac{20152015}{20172017}\)
ta có : \(\frac{20152015}{20172017}=\frac{2015}{2017}\)
\(\frac{20132013}{20152015}=1-\frac{20132013}{20152015}=\frac{2}{20152015}\)
\(\frac{2015}{2017}=1-\frac{2015}{2017}=\frac{2}{2017}\)
mà \(\frac{2}{2017}>\frac{2}{20152015}\) nên \(\frac{20152015}{20172017}<\frac{20132013}{20152015}\)
vậy \(\frac{20152015}{20172017}<\frac{20132013}{20152015}\)