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[latex]a)\frac{2}{4}+0,6=0,5+0,6=1,1\\b)\4,2-1frac{1}{9}=4frac{1}{5}-1frac{1}{9}=4frac{9}{45}-1frac{5}{45}=3frac{4}{45}\\c)\3,6-1frac{1}{2}=3,6-1,5=2,1\\d)\2frac{1}{3}:0,8=frac{7}{3}:frac{8}{10}= frac{7}{3} * frac{10}{8} = frac{70}{24} =2 frac{22}{24} =2 frac{11}{12} \\e)\5,2* frac{2}{7} =5 frac{2}{10} * frac{2}{7} = frac{52}{10} * frac{2}{7} = frac{104}{70} =1 frac{34}{70} =1 frac{17}{25} [/latex] [latex]f)\0,6: frac{2}{3} = frac{6}{10} : frac{2}{3} = frac{6}{10} * frac{3}{2} = frac{18}{20} = frac{9}{10} \\g)\2 frac{3}{20} +1,27=2 frac{15}{100} +1,27=2,15+1,27=3,42\\h)\0,65:6 frac{1}{2} = frac{65}{100} : frac{13}{2} = frac{65}{100} * frac{2}{13} = frac{65}{650} = frac{1}{10} [/latex]