Resposta:
Explicação passo a passo:
A)
[tex]2-\frac{1}{9}+\frac{1}{3}\\\\\frac{2\cdot \:9-1}{9} +\frac{1}{3} =\frac{20}{9} = 2\frac{2}{9}[/tex]
B)
[tex]5-2\div \frac{2}{3}+\frac{1}{2}\\\\5-3+\frac{1}{2}=\frac{5}{2} = 2\frac{1}{2}[/tex]
