Question

2015/2016 * 20162016/19451945 * 194519451945/201520152015

dấu * là dấu nhân

 

Answer 1

\(\frac{2015}{2016}×\frac{20162016}{19451945}×\frac{194519451945}{201520152015}\)

\(=\frac{2015}{2016}×\frac{2016}{1945}×\frac{1945}{2015}\)

\(=\frac{2015×2016×1945}{2016×1945×2015}\)

\(=\frac{2015×2016×1945}{2015×2016×1945}\)

\(=1\)