5 11/12 - 2 3/8

Для сложения и вычитания смешанных чисел приводим дробные части к общему знаменателю. 1) $5 \frac{11}{12} - 2 \frac{3}{8} = 5 \frac{22}{24} - 2 \frac{9}{24} = 3 \frac{13}{24}$ 2) $2 \frac{1}{15} - 1 \frac{5}{21} = 2 \frac{7}{105} - 1 \frac{25}{105} = 1 \frac{112}{105} - 1 \frac{25}{105} = \frac{87}{105} = \frac{29}{35}$ 3) $11 \frac{7}{12} - 11 \frac{5}{6} = 11 \frac{7}{12} - 11 \frac{10}{12} = 10 \frac{19}{12} - 11 \frac{10}{12} = -\frac{3}{12} = -\frac{1}{4}$ 4) $\frac{2}{7} + 7 \frac{2}{5} = \frac{10}{35} + 7 \frac{14}{35} = 7 \frac{24}{35}$ 5) $44 \frac{1}{4} - \frac{1}{6} = 44 \frac{3}{12} - \frac{2}{12} = 44 \frac{1}{12}$ 6) $6 \frac{1}{2} + 3 \frac{3}{4} = 6 \frac{2}{4} + 3 \frac{3}{4} = 9 \frac{5}{4} = 10 \frac{1}{4}$ 7) $11 \frac{3}{14} + 2 \frac{1}{6} = 11 \frac{9}{42} + 2 \frac{7}{42} = 13 \frac{16}{42} = 13 \frac{8}{21}$ 8) $12 \frac{1}{2} + 2 \frac{1}{3} = 12 \frac{3}{6} + 2 \frac{2}{6} = 14 \frac{5}{6}$