Вычислите:1/6+2/7 2) 11/18-5/12 3) 4 7/12+1 3/16 4) 8 17/20-6 7/10

[latex] \frac{1}{6} + \frac{2}{7} = \frac{7+12}{42} = \frac{19}{42} [/latex] [latex] \frac{11}{18} - \frac{5}{12} = \frac{22-15}{36} = \frac{7}{36} [/latex] [latex]4 \frac{7}{12} + 1 \frac{3}{16} = \frac{112+9}{48} = \frac{121}{48} = 2 \frac{25}{48} [/latex] [latex]8 \frac{17}{20} - 6\frac{7}{10} = \frac{34-21}{5} = 2\frac{3}{5} [/latex]