1. Выполните действия: а) 724 - 5 18 б)435+128 в)516+1112 г)1163 - 542

[latex] frac{7}{24} - frac{5}{18} = frac{21-20}{72} = frac{1}{72} [/latex][latex] frac{4}{35} + frac{1}{28} = frac{16+5}{140} = frac{21}{140} = frac{3}{20} = 0.15[/latex][latex] frac{5}{16} + frac{11}{12} = frac{15+44}{48} = frac{49}{48} = 1frac{1}{48} [/latex][latex] frac{11}{63} - frac{5}{42} = frac{22-15}{126} = frac{7}{126} = frac{1}{18} [/latex]