# Exercises for Chapter 1

Classify each of the numbers in Exercises 1–4 as a counting number (N), a whole number (W), an integer (Z), a rational number (Q), an irrational number (I), or a real number (R). Include all the sets to which each number belongs.

Perform each computation first with pencil and paper. Then check your answer with a calculator.

Evaluate each of the following expressions, using *a* = 6, *b* = 3, *c* = −5, and *d* = −2. First do the problem with pencil and paper, and then check your answer with a calculator.

Simplify each of the following algebraic expressions. (Use positive exponents in your answers.)

Want to check your work? Find the answers to these problems.