## Elementary Technical Mathematics

$1\frac{1}{2}$
Convert to like fractions and add the numerators. $\frac{1}{4}+\frac{5}{12}+\frac{5}{6}=\frac{3}{12}+\frac{5}{12}+\frac{10}{12}=\frac{3+5+10}{12}=\frac{18}{12}=1\frac{6}{12}=1\frac{1}{2}$