Răspuns:
Explicație pas cu pas:
[tex]\bf a)~\dfrac{\not 3}{5}\cdot \dfrac{2}{\not3} = \dfrac{1}{5}\cdot \dfrac{2}{1}= \red{\dfrac{2}{5}}[/tex]
[tex]\bf b)~\dfrac{\not 3}{5}\cdot \dfrac{9}{\not6} = \dfrac{1}{5}\cdot \dfrac{9}{2}= \purple{\dfrac{9}{10}}[/tex]
[tex]\bf c)~\dfrac{\not 4}{\not6}\cdot \dfrac{\not6}{\not8} = \dfrac{1}{1}\cdot \dfrac{1}{2}= \blue{\dfrac{1}{2}}[/tex]
[tex]\bf d)~\dfrac{\not 11}{\not12}\cdot \dfrac{\not24}{\not33} = \dfrac{1}{1}\cdot \dfrac{2}{3}= \pink{\dfrac{2}{3}}[/tex]
[tex]\bf e)~\dfrac{9}{11}\cdot 2\dfrac{3}{4}=\dfrac{9}{11}\cdot \dfrac{2\cdot4+3}{4} = \dfrac{9}{\not11}\cdot \dfrac{\not11}{4} = \dfrac{9}{1}\cdot \dfrac{1}{4}= \red{\dfrac{9}{4}}[/tex]
[tex]\bf f)~7\dfrac{1}{8}\cdot 2\dfrac{2}{3}=\dfrac{7\cdot8+1}{8}\cdot \dfrac{2\cdot3+2}{3} = \dfrac{\not57}{\not8}\cdot \dfrac{\not8}{\not3} = \dfrac{19}{1}\cdot \dfrac{1}{1}= \purple{19}[/tex]
[tex]\bf g)~\dfrac{\not4}{9}\cdot \dfrac{11}{7}\cdot \dfrac{\not25}{\not10}=\dfrac{2}{9}\cdot \dfrac{11}{7}\cdot \dfrac{5}{1}= \blue{\dfrac{110}{63}}[/tex]
