91Ó°ÊÓ

In the following exercise, add or subtract:$\frac{5}{12}+\frac{3}{8}$

In the following exercise, add or subtract:$\frac{7}{12}-\frac{9}{16}$

In the following exercise, add or subtract:$\frac{7}{16}-\frac{5}{12}$

In the following exercise, add or subtract:$\frac{2}{3}-\frac{3}{8}$

In the following exercise, add or subtract:$\frac{5}{6}-\frac{3}{4}$

In the following exercise, add or subtract:$-\frac{11}{30}+\frac{27}{40}$

In the following exercise, add or subtract:$-\frac{9}{20}+\frac{17}{30}$

In the following exercise, add or subtract:$-\frac{13}{30}+\frac{25}{42}$

In the following exercises, use the divisibility tests to determine whether each number is divisible by $2,3,5,6$and $10.$

$22,335$

In the following exercise, add or subtract:$-\frac{23}{30}+\frac{5}{48}$