4/5 . 5/8 + 1/8 . 4/5 - 4/5 . -1/4
= 4/5.( 5/8 + 1/8 -(-1/4)
= 4/5. 1
= 4/5
Hok tốt &_&
\(\frac{4}{5}\)X \(\frac{5}{8}\)+\(\frac{1}{8}\)X\(\frac{4}{5}\)-\(\frac{4}{5}\)X\(\frac{-1}{4}\)
=4/5x(5/8+1/8-(-1/4)=4/5x5/4=1
\(\frac{4}{5}.\frac{5}{8}+\frac{1}{8}.\frac{4}{5}-\frac{4}{5}.-\frac{1}{4}\)
=\(\frac{1}{2}+\frac{1}{10}+\frac{1}{5}\)
=\(\frac{5}{10}+\frac{1}{10} +\frac{2}{10}\)
=\(\frac{8}{10}\)=\(\frac{4}{5}\)
mik bị nhầm một xúi nhé
\(=\frac{4}{5}.\left(\frac{5}{8}+\frac{1}{8}-\frac{-1}{4}\right)\)
\(\frac{4}{5}.1=\frac{4}{5}\)
