Question

Решите пж дам 98 баллов

Answer 1

$\displaystyle 3) \frac{3+\frac{\frac{1}{2}-\frac{1}{5} }{3} }{7 -\frac{4}{5} } =\frac{3+\frac{\frac{5}{10}-\frac{2}{10} }{3} }{6\frac{5}{5}- \frac{4}{5} } =\frac{3+\frac{\frac{3}{10}}{3} }{6\frac{1}{5} } =\frac{3+\frac{1}{10} }{\frac{31}{5} } =\frac{31}{10} *\frac{5}{31} =\frac{1}{2}$

$\displaystyle 4)2+\frac{3}{2-1\frac{1}{2} } =2+\frac{3}{1\frac{2}{2} -1\frac{1}{2} } =2+\frac{3}{\frac{1}{2} } =2+6=8$