First convert these into fractions greater than one.

Next, find a common denominator and compute the sums.

$3\frac{5}{8}$

Find a common denominator among these three fractions.

Multiply each fraction by a Giant One to convert each fraction to ensure a common denominator.

Compute the sum and differences.

See part (a). Note these fractions already have a common denominator.

$3\frac{4}{5}$