Răspuns:
[tex]\frac{11}{12}[/tex]
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[tex]\frac{263}{45}[/tex]
Explicație pas cu pas:
[tex]\frac{13}{4}-2\frac{1}{3}[/tex]
[tex]\frac{13}{4}-\frac{2*3+1}{3}[/tex]
[tex]\frac{13}{4}-\frac{7}{3}[/tex]
[tex]\frac{39}{12}-\frac{28}{12}[/tex] = [tex]\frac{11}{12}[/tex]
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[tex]6-\frac{3}{5}+\frac{4}{9}[/tex]
[tex]\frac{6}{1}-\frac{3}{5}+\frac{4}{9}[/tex]
[tex]\frac{270}{45}-\frac{27}{45}+\frac{20}{45}[/tex] = [tex]\frac{263}{45}[/tex]
