36. Найдите значение выражения.

### Решение задания 36 1) $\frac{7}{48} + \frac{7}{36} = \frac{21}{144} + \frac{28}{144} = \frac{49}{144}$ 2) $\frac{7}{18} - \frac{7}{24} = \frac{28}{72} - \frac{21}{72} = \frac{7}{72}$ 3) $\frac{11}{36} - \frac{7}{24} = \frac{22}{72} - \frac{21}{72} = \frac{1}{72}$ 4) $\frac{5}{6} - \frac{1}{15} = \frac{25}{30} - \frac{2}{30} = \frac{23}{30}$ 5) $\frac{5}{9} - \frac{5}{12} = \frac{20}{36} - \frac{15}{36} = \frac{5}{36}$ 6) $\frac{7}{10} + \frac{2}{5} = \frac{7}{10} + \frac{4}{10} = \frac{11}{10} = 1\frac{1}{10}$ 7) $\frac{3}{10} + \frac{4}{15} = \frac{9}{30} + \frac{8}{30} = \frac{17}{30}$ 8) $\frac{1}{2} + \frac{3}{4} = \frac{2}{4} + \frac{3}{4} = \frac{5}{4} = 1\frac{1}{4}$ 9) $\frac{1}{3} + \frac{2}{9} = \frac{3}{9} + \frac{2}{9} = \frac{5}{9}$ 10) $\frac{1}{3} - \frac{1}{7} = \frac{7}{21} - \frac{3}{21} = \frac{4}{21}$ ### Решение задания 37 - 1-я строка: $\frac{5}{7} + \frac{1}{6} = \frac{30}{42} + \frac{7}{42} = \frac{37}{42}$ - 2-я строка (2-е слагаемое): $\frac{7}{9} - \frac{1}{2} = \frac{14}{18} - \frac{9}{18} = \frac{5}{18}$ - 3-я строка (2-е слагаемое): $\frac{1}{6} - \frac{4}{45} = \frac{15}{90} - \frac{8}{90} = \frac{7}{90}$ ### Решение задания 38 1) $\frac{11}{12} + \frac{9}{16} = \frac{44}{48} + \frac{27}{48} = \frac{71}{48} = 1\frac{23}{48}$ 2) $\frac{45}{49} + \frac{3}{7} = \frac{45}{49} + \frac{21}{49} = \frac{66}{49} = 1\frac{17}{49}$ 3) $\frac{1}{4} - \frac{1}{5} = \frac{5}{20} - \frac{4}{20} = \frac{1}{20}$ 4) $\frac{1}{4} + \frac{1}{5} = \frac{5}{20} + \frac{4}{20} = \frac{9}{20}$ 5) $\frac{7}{9} - \frac{1}{2} = \frac{14}{18} - \frac{9}{18} = \frac{5}{18}$ 6) $\frac{5}{6} - \frac{7}{36} = \frac{30}{36} - \frac{7}{36} = \frac{23}{36}$ 7) $\frac{2}{3} + \frac{1}{5} = \frac{10}{15} + \frac{3}{15} = \frac{13}{15}$ 8) $\frac{2}{3} + \frac{5}{9} = \frac{6}{9} + \frac{5}{9} = \frac{11}{9} = 1\frac{2}{9}$ 9) $\frac{2}{3} + \frac{5}{9} = \frac{6}{9} + \frac{5}{9} = \frac{11}{9} = 1\frac{2}{9}$ 10) $\frac{1}{2} + \frac{1}{8} = \frac{4}{8} + \frac{1}{8} = \frac{5}{8}$