91Ó°ÊÓ

Write your answers as proper fractions or mixed numbers, not as improper fractions. Find the following products. (Multiply.) $$10 \cdot 1 \frac{1}{4}$$

Find the quotient in each case by replacing the divisor by its reciprocal and multiplying. $$\frac{3}{5} \div(-2)$$

Factor each of the following into a product of prime factors. $$81$$

Write your answers as proper fractions or mixed numbers, not as improper fractions. Find the following products. (Multiply.) $$\frac{3}{5} \cdot 5 \frac{1}{3}$$

Use the rule for order of operations to simplify each of the following. [Examples 1–3] $$\left(3-\frac{3}{4}\right)\left(3+\frac{1}{3}\right)$$

Find the quotient in each case by replacing the divisor by its reciprocal and multiplying. $$\frac{4}{3} \div \frac{4}{3}$$

Find the following sums and differences, and reduce to lowest terms. (Add or subtract as indicated.) $$\frac{1}{10}-\frac{3}{10}-\frac{4}{10}$$

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

Find the quotient in each case by replacing the divisor by its reciprocal and multiplying. $$\frac{7}{8} \div \frac{8}{7}$$

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