Question

 (\(\frac{-3}{7}\)+\(\frac{4}{11}\))/\(\frac{7}{11}\)+(\(\frac{-4}{7}\)+\(\frac{7}{11}\))/\(\frac{7}{11}\)

Answer 1

(-3/7+4/11)/  7/11+(-4/7+7/11)/  7/11

=(-3/7+4/11)+(-4/7+7/11)/  7/11

=(-3/7+4/11)+(-4/7+7/11)/  7/11

=0/   7/11=0

Answer 2

\(\left(\frac{-3}{7}+\frac{4}{11}\right)\times\frac{7}{11}+\left(\frac{-4}{7}+\frac{7}{11}\right)\times\frac{7}{11}\)

\(=\left(\frac{-3}{7}+\frac{-4}{7}+\frac{4}{11}+\frac{7}{11}\right)\cdot\frac{7}{11}\)

\(=\left(-1+1\right)\cdot\frac{7}{11}\)

\(=0\cdot\frac{7}{11}\)

à đ 

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