a) [latex] 9frac{3}{8} : (1frac{1}{2})^{2} - 1 frac{5}{6} = frac{75}{8} : ( frac{3}{2})^{2} } - 1 frac{5}{6} = frac{75}{8} : frac{9}{4} - frac{11}{6} = frac{75}{8} * frac{4}{9} - frac{11}{6} = frac{75}{18} - frac{11}{6} [/latex] [latex]= frac{75}{18} - frac{33}{18} = frac{42}{18} =2 frac{8}{18} =2 frac{4}{9} [/latex] b)[latex](3 frac{4}{7} + frac{11}{14} ) * 3,5=( frac{25}{7} + frac{11}{14} ) *3,5=( frac{50}{14}+ frac{11}{14})*3,5= frac{61}{14} * frac{35}{10} = frac{2135}{140}= [/latex] [latex]15 frac{35}{140}=15 frac{7}{28} =15 frac{1}{4} = 15,25 [/latex] c)[latex] frac{1-0,125- frac{5}{6} }{(0,25)^{2} } = frac{ frac{7}{8}- frac{5}{6} }{0,0625} = frac{ frac{21}{24}- frac{20}{24} }{0,0625} = frac{ frac{1}{24} }{0,0625} = frac{1}{24} * frac{10000}{625} = frac{10000}{15000}= frac{10}{15}= frac{2}{3} [/latex]
