45. Выполните действия. Образец: $$22\frac{3}{4}+2\frac{5}{12}=(22+\frac{3}{4})+(2+\frac{5}{12}) = (22 + 2) + (\frac{3}{4} + \frac{5}{12}) = $$ $$= 24 + (\frac{9}{12} + \frac{5}{12}) = 24 + \frac{9+5}{12} = 24 + \frac{14}{12} = 25 + 1\frac{2}{12} = 25\frac{1}{6};$$ $$4\frac{3}{8}-2\frac{5}{6}=(4+\frac{3}{8})-(2+\frac{5}{6}) = (4-2) + (\frac{3}{8} - \frac{5}{6}) = 2 + (\frac{9}{24} - \frac{20}{24}) = $$ $$=1+1+(\frac{9}{24} - \frac{20}{24}) = 1 + \frac{24 + 9 - 20}{24} = 1\frac{13}{24}.$$ $$8\frac{1}{2}+2\frac{3}{4}$$