[tex]A)\\\\4,2+3\frac{1}{5}=4\frac{2}{10}+3\frac{2}{10}=7\frac{4}{10}=7\frac{2}{5} \\\\3,75+2 \frac{3}{4} = 3\frac{ 75}{100}+2 \frac{75}{100} = 5\frac{150}{100}=6\frac{50}{100}=6\frac{1}{2}\\\\\\B)\\\\6\frac{1}{4} -3,05=6\frac{25}{100} -3\frac{5}{100}=3\frac{22}{100}=3\frac{11}{50} \\\\10,0-5\frac{1}{2}=4\frac{1}{2}[/tex]
[tex]C)\\\\4,5* \frac{2}{5}= \frac{\not{45}^9}{\not{10}^5}*\frac{\not{2}^1}{\not{5}^1}=\frac{9}{5}=1\frac{4}{5}\\\\\frac{3}{11}*0,22=\frac{3}{\not{11}^1}*\frac{\not{22}^2}{100}=\frac{6}{100}=\frac{3}{50}\\\\D)\\\\5,1:\frac{17}{100}=\frac{\not{51}^3}{\not{10}^1}*\frac{\not{100}^{10}}{\not{17}^1}=30\\\\\frac{3}{4}:0,2=\frac{3}{4}:\frac{2}{10}=\frac{3}{\not{4}^2}*\frac{\not{10}^5}{2}=\frac{15}{4}=3\frac{3}{4}[/tex]
