\(\frac37\) và \(\frac{-6}{7}\)

vì\(\frac37>0;-\frac67<0\)

=>\(\frac37>-\frac67\)

\(\frac{-7}{31}\) và \(\frac{6}{31}\)

\(\frac{-7}{31}<0;\frac{6}{31}>0\)

=>\(-\frac{7}{31}<\frac{6}{31}\)

\(\frac{-97}{128}\) và \(-\frac{99}{128}\)

vì \(\frac{97}{128}<\frac{99}{128}\) =>\(\frac{-97}{128}>-\frac{99}{128}\)

h)\(\frac59\times\frac{7}{13}+\frac59\times\frac{9}{13}-\frac59\times\frac{3}{13}\)

=\(\frac59\times\left(\frac{7}{13}+\frac{9}{13}-\frac{3}{13}\right)\)

=\(\frac59\times1\)

=\(\frac59\)

g)\(\frac{4}{19}\times\frac{-3}{7}+\frac{-3}{7}\times\frac{15}{19}+\frac57\)

=\(\frac{-3}{7}\times\left(\frac{4}{19}+\frac{15}{19}\right)+\frac57\)

=\(\frac{-3}{7}\times1+\frac57\)

=\(\frac{-3}{7}+\frac57\)

=\(\frac27\)

f)\(\frac13\times\frac45+\frac13\times\frac65-\frac43\)

=\(\frac13\times\frac45+\frac13\times\frac65-\frac13\times4\)

=\(\frac13\times\left(\frac45+\frac65-4\right)\)

=\(\frac13\times\left(\frac{10}{5}-4\right)\)

=\(\frac13\times\left(2-4\right)\)

=\(\frac13\times\left(-2\right)\)

=\(\frac{-2}{3}\)