[tex]\it 2\dfrac{1}{2}-2\dfrac{1}{3}:0,(3)=\dfrac{5}{2}-\dfrac{7}{3}:\dfrac{3}{9}=\dfrac{5}{2}-\dfrac{7}{\not3}\cdot\dfrac{\not9}{\not3\ _1}=2,5-7=-4,5[/tex]
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[tex]\it 2\dfrac{1}{2}-2\dfrac{1}{3}:0,(3)=\dfrac{5}{2}-\dfrac{7}{3}:\dfrac{3}{9}=\dfrac{5}{2}-\dfrac{7}{\not3}\cdot\dfrac{\not9}{\not3\ _1}=\dfrac{5}{2}-\dfrac{^{2)}7}{\ \ 1}=\dfrac{5-14}{2}=-\dfrac{9}{2}[/tex]
