91Ó°ÊÓ

Replace each • with <, >, or = to make a true. sentence.

$\frac{5}{6}·0.875$

Find each sum or difference.

$20+\left(−7\right)$

Find each sum or difference.

$-19-8$

Find each sum or difference.

$−31+(−4)$

Write each fraction in the simplest form. If the fraction is already in the simplest form, write the simplest form.

$\frac{36}{12}$

The simplified value of the expression $42.3÷\left(-6\right)$.

Name the set or sets of numbers to which each real number belongs.

$\sqrt{\mathbf{28}}$

COOKIES Bobby baked 2 dozen chocolate chip cookies, 3 dozen sugar cookies, and a dozen oatmeal raisin cookies. How many total cookies did he bake?

Example 3 Determine whether each relation is a function.

$x=15$

Evaluate each expression using properties of numbers. Name the property used in each step.

$\left(16-4^2\right)+9$