4. Fractions

Add the following fractions and express the answer it its simplest form.

$\frac{3}{8}+\frac{5}{8}$

Add the following fractions and express the answer it its simplest form.

$\frac{7}{11}+(-\frac{2}{11})$

Add the following fractions and express the answer it its simplest form.

$\frac{7}{10}+(-\frac{2}{10})+\frac{4}{10}$

Add the following fractions and express the answer it its simplest form.

$\frac{2}{8x}-\frac{1}{8x}$