Zad.6 a)[latex] frac{3}{15} =0,12[/latex] b)[latex] frac{5}{8} =0,625[/latex] c)[latex] frac{9}{20} =0,45[/latex] d)[latex] frac{3}{4}=0,75 [/latex] e)[latex] frac{32}{400} =0,08[/latex] f)[latex] frac{55}{250} =0,22[/latex] g)[latex] frac{18}{360} =0,05[/latex] h)[latex] frac{27}{300} =0,09[/latex] i)[latex]0,48= frac{12}{25} [/latex] j)[latex]0,075= frac{3}{40} [/latex] k)[latex]0,15= frac{3}{20} [/latex] l)[latex]0,012= frac{3}{250} [/latex] m)[latex] frac{25}{4} =6,25[/latex] n)[latex] frac{17}{5} =3,4[/latex] o)[latex]4,16= frac{104}{25} [/latex] p)[latex]56,875= frac{455}{8} [/latex] zad.7 a) [latex] frac{2}{3} *0,75= frac{2}{3}* frac{3}{4} = frac{6}{12} = frac{1}{2} [/latex] b)[latex]0,6*2 frac{1}{3} = frac{3}{5} * frac{7}{3} = frac{21}{15} =1 frac{6}{15} [/latex] c)[latex]12,4: frac{2}{3} = frac{62}{5} * frac{3}{2} = frac{186}{10}=18 frac{3}{5} [/latex] d)[latex]3 frac{5}{8} :1 frac{1}{2} = frac{29}{8} : frac{3}{2} =frac{29}{8}* frac{2}{3} =2 frac{5}{12} [/latex] e)[latex]4,5* frac{2}{9} +1 frac{1}{3} :0,75= frac{9}{2} * frac{2}{9} + frac{4}{3} * frac{4}{3} =1+ frac{16}{9} =2 frac{7}{9} [/latex] f)[latex](5 frac{4}{5} +1,4)*(3 frac{7}{25} -3,08)=(5 frac{4}{5} +1 frac{2}{5} )*(3 frac{7}{25} -3 frac{2}{25})=7 frac{1}{5}* frac{5}{25} = frac{36}{5} * frac{1}{5}[/latex]=[latex] frac{36}{25} =1 frac{11}{25} [/latex] g)[latex]10 frac{5}{12} -(3 frac{1}{6} -1 frac{2}{3}+5,375)=10 frac{5}{12} -(3 frac{1}{6}-1 frac{4}{6} +5 frac{3}{8} )=[/latex][latex]10 frac{5}{12}- (1 frac{3}{6} +5 frac{3}{8} )=10 frac{10}{24} -(1 frac{12}{24} +5 frac{9}{24} )=9 frac{34}{24}-6 frac{21}{24} =3 frac{13}{24}[/latex] h)[latex](0,5+ frac{2}{7})* frac{7}{11} =( frac{1}{2} +frac{2}{7})* frac{7}{11}= (frac{7}{14} + frac{4}{14})* frac{7}{11}= frac{11}{14} * frac{7}{11}= frac{1}{2} [/latex]
