Rezolvare:
[tex]5\dfrac{2}{7} - 1\dfrac{1}{7} = 5 + \dfrac{2}{7} - 1 - \dfrac{1}{7} = 5-1+\dfrac{2-1}{7} = 4+\dfrac{1}{7} = 4\dfrac{1}{7}[/tex]
[tex]6\dfrac{3}{4} - 5\dfrac{1}{2} = 6 + \dfrac{3}{4} - 5 - \dfrac{^{2)} 1}{2} = 6 - 5 + \dfrac{3 - 2}{4} = 1 + \dfrac{1}{4} = 1\dfrac{1}{4}[/tex]
[tex]^{2)} 4 - 3\dfrac{1}{2} = \dfrac{8}{2} - \dfrac{6+1}{2} = \dfrac{8}{2} - \dfrac{7}{2} = \dfrac{8-7}{2} = \dfrac{1}{2}[/tex]
