zad53 a)[latex] frac{2}{5} *5+ frac{1}{3} =2+ frac{1}{3}=2 frac{1}{3} [/latex] b)[latex]3+2* frac{2}{5} =3+ frac{4}{5} =3 frac{4}{5} [/latex] c)[latex] frac{3}{4}+ frac{1}{4} *8= frac{3}{4} +2=2 frac{3}{4} [/latex] d)[latex]8*( frac{1}{4} +0,25)=8*(0,25+0,25)=8*0,5=4[/latex] e)1,6-0,6:2=1,6-0,3=1,3 f)[latex]5 frac{1}{5} - frac{1}{5}*10=5 frac{1}{5}-2=3 frac{1}{5} [/latex] zad55 a) [latex]5- frac{3}{7} : frac{3}{14} =5- frac{3}{7} * frac{14}{3} =5-2=3 [/latex] b)[latex] frac{0,12-0,04}{2} = frac{0,08}{2} =0,04[/latex] c)0,6+0,4*10=0,6+4=4,6 d)0,2²-0,1²=0,04-0,01=0,03 e)[latex]6-1 frac{1}{2}* frac{2}{3}=6- frac{3}{2}* frac{2}{3} =6-1=5 [/latex] f)7,5+2:5=7,5+0,4=7,9 g)[latex]6-( frac{1}{2})^2*2=6- frac{1}{4}*2=6- frac{1}{2}=5 frac{1}{2} [/latex] h)(1,3+2,7)*1[latex] frac{1}{4} [/latex]-1,2=4*[latex] frac{5}{4} [/latex]-1,2=5-1,2=3,8 i)[latex] frac{4}{5}*0.5+ frac{2}{9}*0,9= frac{4}{5} * frac{5}{10}+ frac{2}{9}* frac{9}{10}= frac{4}{10} + frac{2}{10}= frac{6}{10}=0,6 [/latex] j)[latex]3 frac{3}{4}*4-10* frac{2}{5}= frac{15}{4}*4-4=15-4=11 [/latex]
