2.164 Найдите сумму: а)$$\frac{1}{6} + \frac{5}{8}$$; б) $$\frac{7}{8} + \frac{5}{14}$$; в) $$\frac{7}{10} + \frac{3}{25}$$; г) $$\frac{27}{70} + \frac{16}{105}$$; д) $$\frac{11}{18} + \frac{1}{81}$$; е) $$\frac{5}{12} + \frac{3}{44}$$; ж) $$\frac{15}{56} + \frac{11}{84}$$; з) $$\frac{11}{21} + \frac{3}{49}$$

a) $$\frac{1}{6} + \frac{5}{8} = \frac{4}{24} + \frac{15}{24} = \frac{19}{24}$$

б) $$\frac{7}{8} + \frac{5}{14} = \frac{49}{56} + \frac{20}{56} = \frac{69}{56} = 1\frac{13}{56}$$

в) $$\frac{7}{10} + \frac{3}{25} = \frac{35}{50} + \frac{6}{50} = \frac{41}{50}$$

г) $$\frac{27}{70} + \frac{16}{105} = \frac{81}{210} + \frac{32}{210} = \frac{113}{210}$$

д) $$\frac{11}{18} + \frac{1}{81} = \frac{99}{162} + \frac{2}{162} = \frac{101}{162}$$

е) $$\frac{5}{12} + \frac{3}{44} = \frac{55}{132} + \frac{9}{132} = \frac{64}{132} = \frac{16}{33}$$

ж) $$\frac{15}{56} + \frac{11}{84} = \frac{45}{168} + \frac{22}{168} = \frac{67}{168}$$

з) $$\frac{11}{21} + \frac{3}{49} = \frac{77}{147} + \frac{9}{147} = \frac{86}{147}$$