Evaluate:

$0 + \dfrac{-2}{7}$

$\dfrac{0}{1} + \dfrac{-2}{7}$

LCM of 1 and 7 is 7

$\dfrac{0 \times 7}{1 \times 7} + \dfrac{-2 \times 1}{7 \times 1} \\[1em] =\dfrac{0}{7} + \dfrac{-2}{7} \\[1em] =\dfrac{0 + (-2)}{7} \\[1em] =\dfrac{-2}{7}$

∴ 0 + $\dfrac{-2}{7}$ = $\dfrac{-2}{7}$