Вычисли сумму для заданных выражений

a) $4\frac{2}{9} + 3\frac{5}{18} = 4\frac{4}{18} + 3\frac{5}{18} = (4+3) + (\frac{4}{18} + \frac{5}{18}) = 7 + \frac{9}{18} = 7 + \frac{1}{2} = 7\frac{1}{2}$ б) $3\frac{3}{5} + 4\frac{4}{7} = 3\frac{21}{35} + 4\frac{20}{35} = (3+4) + (\frac{21}{35} + \frac{20}{35}) = 7 + \frac{41}{35} = 7 + 1\frac{6}{35} = 8\frac{6}{35}$ в) $7\frac{11}{12} + 1\frac{3}{8} = 7\frac{22}{24} + 1\frac{9}{24} = (7+1) + (\frac{22}{24} + \frac{9}{24}) = 8 + \frac{31}{24} = 8 + 1\frac{7}{24} = 9\frac{7}{24}$ г) $4\frac{3}{4} + 2\frac{4}{7} = 4\frac{21}{28} + 2\frac{16}{28} = (4+2) + (\frac{21}{28} + \frac{16}{28}) = 6 + \frac{37}{28} = 6 + 1\frac{9}{28} = 7\frac{9}{28}$ д) $6\frac{5}{11} + 5 = 11\frac{5}{11}$ е) $7\frac{3}{7} + \frac{5}{21} = 7\frac{9}{21} + \frac{5}{21} = 7 + \frac{14}{21} = 7 + \frac{2}{3} = 7\frac{2}{3}$