Oblicz: a) 5,35 + [latex] frac{1}{4} [/latex]= b) 6,78 - [latex]frac{3}{8} [/latex]= c) [latex] frac{2}{9} [/latex] * 6,3 = d)[latex]2 frac{2}{5} [/latex] : 0,25= daje naj. mam na jutro mam sprawdzian

A) [latex]5,35+ frac{1}{4} =5,35+0,25=5,60 [/latex]    lub możesz to wykonać w takiej postaci: [latex]5,35+ frac{1}{4} =5 frac{35}{100} + frac{1}{4} = frac{535}{100} + frac{1}{4} = frac{535}{100}+ frac{25}{100} = frac{560}{100} =5 frac{6}{100}[/latex] B)[latex]6,78- frac{3}{8}=6 frac{78}{100} - frac{3}{8} = frac{678}{100} - frac{3}{8}= frac{5424}{800} - frac{300}{800} = frac{5124}{800}=6 frac{324}{800}=6 frac{117}{400} [/latex] C)[latex] frac{2}{9} *6,3= frac{2}{9} *6 frac{3}{10} = frac{2}{9} * frac{63}{10}= frac{1}{9} * frac{63}{5} = frac{1}{1} * frac{7}{5} = frac{7}{5} =1 frac{2}{5} [/latex] D)[latex]2 frac{2}{5}:0,25= frac{12}{5} : frac{25}{100} = frac{12}{5} * frac{100}{25} = frac{12}{1} * frac{20}{25}= frac{240}{25} =9 frac{15}{25} =9 frac{3}{5} [/latex]