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Course: Algebra I / Elementary Algebra
Topic: Introduction to Algebra
Subtopic: The Real Number System & Calculators

Overview

The graphing calculator is going to be an invaluable tool in this class. With this lesson we learn about the Real Number System as well as how to perform real number operations on a calculator. BTW, "Real numbers" are just all the numbers that you are used to dealing with -- decimals, fractions, the irrational number pi, etc. as opposed to "imaginary numbers" which we will learn about in Intermediate Algebra.

Objectives

By the end of this topic you should know and be prepared to be tested on:

Terminology

Define: decimal, fraction (proper and improper), mixed number, repeating decimal, integer, rational number, irrational number, Real number, opposite (of a number; of an expression), reciprocal (of a number; of an expression), absolute value (of a number; of an expression), exponent, radical, root, order of operations, prime number, composite number, prime factorization, reduce, cancel, simplify.

Supplementary Resources

You must be able to use a scientific (or graphing) calculator (handheld or software) to perform basic operations including working with signs and fractions and finding powers, roots, and absolute values. If you have a handheld graphing calculator then these sites may help:

Review Pre-Algebra: Feeling like you need to spend a bit of time reviewing pre-algebra / arithmetic topics? I have links to lessons, videos, and some games covering the main topics from pre-algebra in my Just-In-Time Mathematics website.