2.250 Найдите сумму: г) $$54\frac{3}{4} + 18\frac{5}{6}$$

г) $$54\frac{3}{4} + 18\frac{5}{6} = 54\frac{3\cdot3}{4\cdot3} + 18\frac{5\cdot2}{6\cdot2} = 54\frac{9}{12} + 18\frac{10}{12} = (54+18) + (\frac{9}{12} + \frac{10}{12}) = 72 + \frac{19}{12} = 72 + 1\frac{7}{12} = 73\frac{7}{12}$$

Ответ: $$73\frac{7}{12}$$