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[tex]\dfrac{2}{5}+\dfrac{1}{6}=\dfrac{\boxed{12}}{30}+\dfrac{\boxed5}{30}=\dfrac{\boxed{17}}{30}[/tex]
[tex]\frac{2}{5}+\frac{1}{6}=\frac{2*6}{5*6}+\frac{1*5}{6*5}=\frac{12}{30}+\frac{5}{30}\\\\=\frac{17}{30}[/tex]
