Question

2/5-7/5:(-1+-3/4)=?

Answer 1

\(\frac{2}{5}-\frac{7}{5}:\left(-1+\frac{-3}{4}\right)=\frac{2}{5}-\frac{7}{5}:\left(-\frac{4}{4}+-\frac{3}{4}\right)=\frac{2}{5}-\frac{7}{5}:\frac{-7}{4}\)

\(=\frac{2}{5}-\frac{7}{5}\times\frac{4}{-7}=\frac{2}{5}+\frac{4}{5}=\frac{6}{5}\)

Answer 2

2/5-7/5:(-1+-3/4)

=2/5-7/5:(-4/4+-3/4)

=2/5-7/5:(-7/4)

=2/5-7/5*(-4/7)

=2/5--4/5

=-2/5