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Paper Plates Activity Write down any integer from -100 to 100 on your paper plate. Switch with a partner Line up in the correct order from least to greatest Algebra Chapter 2: Properties of Real Numbers Section 1: The Real Number Line Vocabulary Real number: all the numbers used in your Algebra book Real number line: points on a line, a number line Every real number is either positive, negative, or zero. Positive number: points to the right of zero on a number line Negative number: points to the left of zero on a number line Zero is neither positive nor negative Integer: is either positive, negative, or zero. The scale marks on the real number line are equally spaced and represent integers. Ex. …-3, -2, -1, 0, 1, 2, 3… Whole number: zero and the positive integers. Ex. …-3, -2, -1, 0 1, 2, 3… Negative integers Zero Positive integers Example 1: Graph Integers Graph -3, -1, and 4 on a number line. Example 2: Compare Integers Graph -7 and -6 on a number line. Then write two inequalities that compare the numbers. -7 < -6 -6 > -7 Example 3: Graph Real Numbers Graph 1 ¾ and 2.7 on a number line. Example 4: Order Real Numbers Write the numbers -1.5, 1/3, -3, 2.5, 0, and -1 in increasing order. -3, -1.5, -1, 0, 1/3, 2.5 Example 5: Compare Real Numbers The table shows the balance of a checking account that has overdraft protection each day for four days in August. Which balance was the lowest? Date Balance ($) Aug. 20 -5 Aug. 21 195 Aug. 22 150 Aug. 23 -11 Homework 2.1 B You do not have to graph the numbers on a number line. Just put them in order as instructed. Do 10 through 18 on the back of your paper. DO NOT try to squish all of the numbers on the front!