Presentation on theme: "2.1 The real #s and absolute value"— Presentation transcript:
1 2.1 The real #s and absolute value Objective: Compare real numbers.Standards Addressed: C: Distinguish between and order rational and irrational numbers.2.1.8.F: Use the number line model to demonstrate integers and their applications.
2 The real numbers: Natural numbers (N) 1, 2, 3, …. Whole numbers (W) , 1, 2, 3, ….Integers (Z) …, -3, -2, -1, 0, 1, 2, 3, …Rational numbers (Q) p/q, where p and q are integers and q ≠ 0.Terminating (2.77) & repeating (1/3)Irrational numbers (I) #s whose decimal part doesn’t terminate or repeat (i.e. ∏ )Real numbers (R) all rational & irrational #s
4 Ex.1 a. 0 b. ½ c. -8 d. 8 e. R, Q, Z, W R, Q R, Q, Z R, Q, Z, W, N R, I
5 Ex.2 Use division to write each rational # as a decimal & indicate whether the # is a terminating decimal or a repeating decimal.a. 4/5Terminatingb. 4/11Repeatingc. 5/8Terminatingd. 7/9Repeatinge. 5/12Repeatingf. ¾Terminating
6 The Symbols Used to compare 2 Real #s are stated & Explained Below: < is less than or equal to> is greater than or equal to