Найдите сумму: 1) 12 3/8 + 8 1/6; 2) 3 13/15 + 6 7/10... Найдите разность: 1) 7 5/6 - 3 2/3... Выполните вычитание: 1) 3 1/16 - 1 1/8...

50. Найдите сумму: 1) $12 \frac{3}{8} + 8 \frac{1}{6} = 12 \frac{9}{24} + 8 \frac{4}{24} = 20 \frac{13}{24}$ 2) $3 \frac{13}{15} + 6 \frac{7}{10} = 3 \frac{26}{30} + 6 \frac{21}{30} = 9 \frac{47}{30} = 10 \frac{17}{30}$ 3) $9 \frac{8}{21} + 4 \frac{11}{14} = 9 \frac{16}{42} + 4 \frac{33}{42} = 13 \frac{49}{42} = 13 \frac{7}{6} = 14 \frac{1}{6}$ 4) $8 \frac{5}{9} + 7 \frac{3}{4} + 12 \frac{7}{12} = 8 \frac{20}{36} + 7 \frac{27}{36} + 12 \frac{21}{36} = 27 \frac{68}{36} = 27 \frac{17}{9} = 28 \frac{8}{9}$ 51. Найдите разность: 1) $7 \frac{5}{6} - 3 \frac{2}{3} = 7 \frac{5}{6} - 3 \frac{4}{6} = 4 \frac{1}{6}$ 2) $8 \frac{5}{12} - 6 \frac{7}{20} = 8 \frac{25}{60} - 6 \frac{21}{60} = 2 \frac{4}{60} = 2 \frac{1}{15}$ 3) $11 \frac{11}{12} - 5 \frac{7}{9} = 11 \frac{33}{36} - 5 \frac{28}{36} = 6 \frac{5}{36}$ 4) $9 \frac{17}{24} - 8 \frac{11}{36} = 9 \frac{51}{72} - 8 \frac{22}{72} = 1 \frac{29}{72}$ 52. Выполните вычитание: 1) $3 \frac{1}{16} - 1 \frac{1}{8} = 3 \frac{1}{16} - 1 \frac{2}{16} = 2 \frac{17}{16} - 1 \frac{2}{16} = 1 \frac{15}{16}$ 3) $4 \frac{2}{7} - 1 \frac{4}{9} = 4 \frac{18}{63} - 1 \frac{28}{63} = 3 \frac{81}{63} - 1 \frac{28}{63} = 2 \frac{53}{63}$ 4) $8 \frac{5}{36} - 1 \frac{43}{108} = 8 \frac{15}{108} - 1 \frac{43}{108} = 7 \frac{123}{108} - 1 \frac{43}{108} = 6 \frac{80}{108} = 6 \frac{20}{27}$