Poziom A
[tex]a)\frac25=\frac{2*2}{5*2}=\frac4{10}\\\\b)\frac57=\frac{5*4}{7*4}=\frac{20}{28}\\\\c)\frac79=\frac{7*3}{9*3}=\frac{21}{27}\\\\d)\frac46=\frac{4*8}{6*8}=\frac{32}{48}\\\\e)\frac23=\frac{2*6}{3*6}=\frac{12}{18}\\\\f)\frac35=\frac{3*9}{5*9}=\frac{27}{45}\\\\g)\frac58=\frac{5*5}{8*5}=\frac{25}{40}\\\\h)\frac15=\frac{1*9}{5*9}=\frac9{45}\\\\i)\frac29=\frac{2*7}{9*7}=\frac{17}{63}\\\\j)\frac26=\frac{2*10}{6*10}=\frac{20}{60}\\\\k)\frac37=\frac{3*6}{7*6}=\frac{18}{42}\\\\l)\frac25=\frac{2*11}{5*11}=\frac{22}{55}[/tex]
