91Ó°ÊÓ

Factor each of the following into a product of prime factors. $$215$$

Name the denominator of each fraction. $$\frac{a}{12}$$

Factor each of the following into a product of prime factors. $$75$$

Use the rule for order of operations to simplify each of the following. [Examples 1–3] $$\frac{2}{3}+\frac{1}{3}\left(2 \frac{1}{2}+\frac{1}{2}\right)^{2}$$

Find the following sums and differences, and reduce to lowest terms. (Add or subtract as indicated.) $$\frac{5}{a}+\frac{4}{a}+\frac{3}{a}$$

Write your answers as proper fractions or mixed numbers, not as improper fractions. Find the following products. (Multiply.) $$\frac{7}{8} \cdot 6 \cdot 1 \frac{5}{6}$$

Factor each of the following into a product of prime factors. $$42$$

Find each of the following products. (Multiply.) $$\frac{x}{y} \cdot \frac{y}{z} \cdot \frac{z}{x}$$

Change each improper fraction to a mixed number. $$\frac{29}{6}$$

Use the rule for order of operations to simplify each of the following. [Examples 1–3] $$2 \frac{3}{8}+\frac{1}{2}\left(\frac{1}{3}+\frac{5}{3}\right)^{3}$$