oblicz 5/4×8/5-(0.8-0.55)= 20-3/4:0.1= błagam szybko to już na jutro dam naj

[latex]frac{ ot5_{1}}{ ot4_{1}}*frac{ ot8_{2}}{ ot5_{1}}-(0,8-0,55)=2-0,25=1,75[/latex] [latex]20-frac{3}{4}:0,1=20-frac{3}{4}:frac{1}{10}=20-frac{3}{ ot4_{2}}* ot10_{5}=20-frac{15}{2}=20-7,5=12,5[/latex]