Вычисли сумму дробей: 7/10 + 3/25; 27/70 + 16/105; 11/18 + 1/81; 5/12 + 3/44; 15/56 + 11/84; 11/21 + 3/49

Чтобы сложить дроби, нужно привести их к общему знаменателю. в) \(\frac{7}{10} + \frac{3}{25}\) = \(\frac{7*5}{10*5} + \frac{3*2}{25*2}\) = \(\frac{35}{50} + \frac{6}{50}\) = \(\frac{41}{50}\) г) \(\frac{27}{70} + \frac{16}{105}\) = \(\frac{27*3}{70*3} + \frac{16*2}{105*2}\) = \(\frac{81}{210} + \frac{32}{210}\) = \(\frac{113}{210}\) д) \(\frac{11}{18} + \frac{1}{81}\) = \(\frac{11*9}{18*9} + \frac{1*2}{81*2}\) = \(\frac{99}{162} + \frac{2}{162}\) = \(\frac{101}{162}\) е) \(\frac{5}{12} + \frac{3}{44}\) = \(\frac{5*11}{12*11} + \frac{3*3}{44*3}\) = \(\frac{55}{132} + \frac{9}{132}\) = \(\frac{64}{132}\) = \(\frac{16}{33}\) ж) \(\frac{15}{56} + \frac{11}{84}\) = \(\frac{15*3}{56*3} + \frac{11*2}{84*2}\) = \(\frac{45}{168} + \frac{22}{168}\) = \(\frac{67}{168}\) з) \(\frac{11}{21} + \frac{3}{49}\) = \(\frac{11*7}{21*7} + \frac{3*3}{49*3}\) = \(\frac{77}{147} + \frac{9}{147}\) = \(\frac{86}{147}\)