Решение примеров СВОД - 1 - 6

Ниже представлены решения примеров из первого столбика (СВОД - 1 - 6). Решения оформлены так, чтобы их было удобно переписать в тетрадь. 1) \( -\frac{3}{4} - \frac{2}{3} = -\frac{9}{12} - \frac{8}{12} = -\frac{17}{12} = -1\frac{5}{12} \) 2) \( -\frac{7}{15} - \frac{3}{40} = -\frac{56}{120} - \frac{9}{120} = -\frac{65}{120} = -\frac{13}{24} \) 3) \( -\frac{3}{10} + \frac{4}{5} = -\frac{3}{10} + \frac{8}{10} = \frac{5}{10} = \frac{1}{2} \) 4) \( -\frac{1}{20} + \frac{1}{30} = -\frac{3}{60} + \frac{2}{60} = -\frac{1}{60} \) 5) \( \frac{5}{8} - 1 = \frac{5}{8} - \frac{8}{8} = -\frac{3}{8} \) 6) \( -\frac{2}{9} - \frac{5}{6} = -\frac{4}{18} - \frac{15}{18} = -\frac{19}{18} = -1\frac{1}{18} \) 7) \( \left( -\frac{2}{3} + \frac{5}{12} \right) - \frac{9}{20} = \left( -\frac{8}{12} + \frac{5}{12} \right) - \frac{9}{20} = -\frac{3}{12} - \frac{9}{20} = -\frac{1}{4} - \frac{9}{20} = -\frac{5}{20} - \frac{9}{20} = -\frac{14}{20} = -\frac{7}{10} \) 8) \( -\frac{3}{4} - \left( -\frac{5}{6} \right) = -\frac{3}{4} + \frac{5}{6} = -\frac{9}{12} + \frac{10}{12} = \frac{1}{12} \) 9) \( -3 - \frac{4}{9} = -3\frac{4}{9} \) 10) \( -\frac{4}{5} - \frac{4}{7} = -\frac{28}{35} - \frac{20}{35} = -\frac{48}{35} = -1\frac{13}{35} \) 11) \( -\frac{5}{18} - \frac{4}{45} = -\frac{25}{90} - \frac{8}{90} = -\frac{33}{90} = -\frac{11}{30} \) 12) \( -\frac{7}{24} + \frac{5}{18} = -\frac{21}{72} + \frac{20}{72} = -\frac{1}{72} \) 13) \( \frac{5}{42} - \frac{11}{63} = \frac{15}{126} - \frac{22}{126} = -\frac{7}{126} = -\frac{1}{18} \) 14) \( -1 + \frac{4}{9} = -\frac{9}{9} + \frac{4}{9} = -\frac{5}{9} \) 15) \( -\frac{2}{9} - \frac{5}{6} = -\frac{4}{18} - \frac{15}{18} = -\frac{19}{18} = -1\frac{1}{18} \) 16) \( \left( -\frac{5}{9} + \frac{11}{36} \right) - \frac{7}{20} = \left( -\frac{20}{36} + \frac{11}{36} \right) - \frac{7}{20} = -\frac{9}{36} - \frac{7}{20} = -\frac{1}{4} - \frac{7}{20} = -\frac{5}{20} - \frac{7}{20} = -\frac{12}{20} = -\frac{3}{5} \) 17) \( -\frac{5}{8} - \left( -\frac{7}{12} \right) = -\frac{5}{8} + \frac{7}{12} = -\frac{15}{24} + \frac{14}{24} = -\frac{1}{24} \) 18) \( \frac{5}{9} - 1 = \frac{5}{9} - \frac{9}{9} = -\frac{4}{9} \) 19) \( -\frac{5}{6} + \frac{11}{18} = -\frac{15}{18} + \frac{11}{18} = -\frac{4}{18} = -\frac{2}{9} \) 20) \( -\frac{3}{7} - \frac{5}{6} = -\frac{18}{42} - \frac{35}{42} = -\frac{53}{42} = -1\frac{11}{42} \) 21) \( -\frac{5}{12} - \frac{2}{15} = -\frac{25}{60} - \frac{8}{60} = -\frac{33}{60} = -\frac{11}{20} \) 22) \( \frac{5}{12} - \frac{7}{9} = \frac{15}{36} - \frac{28}{36} = -\frac{13}{36} \)