Прошу помогите дам макс кол-во баллов (все примеры)

А:
$\frac{3}{4}$ - $\frac{2}{5}$ = $\frac{7}{20}$
$\frac{1}{3}$ + $\frac{5}{12}$ = $\frac{5}{6}$
$\frac{5}{8}$ - $\frac{3}{16}$ = $\frac{7}{16}$
$\frac{1}{10}$ + $\frac{7}{10}$ = $\frac{4}{5}$
$\frac{9}{17}$ + $\frac{8}{17}$ =1
$\frac{2}{5}$ - $\frac{1}{3}$ = $\frac{1}{15}$
$\frac{1}{6}$ + $\frac{5}{12}$ = $\frac{7}{12}$
$\frac{5}{9}$ - $\frac{4}{27}$ = $\frac{11}{27}$
$\frac{1}{8}$ + $\frac{3}{8}$ = $\frac{1}{2}$
$\frac{7}{10}$ - $\frac{1}{2}$ = $\frac{1}{5}$
$\frac{7}{12}$ + $\frac{1}{2}$ =1 $\frac{1}{12}$
$\frac{2}{7}$ + $\frac{5}{14}$ = $\frac{9}{14}$
$\frac{11}{15}$ - $\frac{2}{5}$ = $\frac{1}{3}$
$\frac{5}{6}$ - $\frac{1}{6}$ = $\frac{2}{3}$
$\frac{1}{6}$ + $\frac{3}{5}$ = $\frac{23}{30}$