Oblicz: 1 cała 4/5+3,25 4,5-1cała 3/5 3całe 1/3*1,125 2,2:1cała5/6 Pliss potrzebne na dziś!

[latex]1 frac{4}{5}+3,25=1 frac{4}{5}+3frac{1}{4}=1 frac{16}{20}+3frac{5}{20}=4frac{21}{20}=5frac{1}{20}[/latex] [latex]4,5-1frac{3}{5}=4frac{1}{2}-1frac{3}{5}=3frac{3}{2}-1frac{3}{5}=3frac{15}{10}-1frac{6}{10}=2frac{9}{10}[/latex] [latex]3frac{1}{3}*1,125=frac{10}{3}*1,125=frac{ ot10^5}{ ot3^1}*frac{ ot9^3}{ ot8^4}=frac{15}{4}=3frac{3}{4}[/latex] [latex]2,2:1frac{5}{6}=frac{22}{10}:frac{11}{6}=frac{ ot11^1}{5}*frac{6}{ ot11^1}=frac{6}{5}=1frac{1}{5}[/latex]