91Ó°ÊÓ

In the following exercise, simplify:$-\frac{7}{24}+\frac{2}{24}$

In the following exercise, simplify:$-\frac{5}{18}+\frac{1}{18}$

In the following exercise, simplify:$\frac{8}{15}÷\frac{12}{5}$

In the following exercise, simplify:$\frac{7}{12}÷\frac{9}{28}$

In the following exercise, add or subtract:$\frac{1}{2}+\frac{1}{7}$

In the following exercise, add or subtract:$\frac{1}{3}+\frac{1}{8}$

In the following exercise, add or subtract:$\frac{1}{3}-(-\frac{1}{9})$

In the following exercises, use the divisibility tests to determine whether each number is divisible by $2,3,5,6,and10.$
$550$

In the following exercise, add or subtract:$\frac{1}{4}-(-\frac{1}{8})$

In the following exercise, add or subtract:$\frac{7}{12}+\frac{5}{8}$