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Published byAmber Abigail Carroll Modified over 8 years ago

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Warm Up 1. To which subgroups of the real numbers does each of the following belong? a. 8 b. -6 c. 2.658694368946587610568….. 2. Use an inequality to compare the two numbers. a. 1.265 and 5/4 b. 4.2 and

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PROPERTIES OF REAL NUMBERS Section 1.4

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Objective TSWBAT: Identify properties of real numbers. Simplify expressions.

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Commutative Property Order does not matter Addition a + b = b + a Multiplication

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Associative Property Changing the grouping does not matter. Addition (a + b) + c = a + (b + c) Multiplication

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Identity The operation that keeps the first number equal to the answer. Addition a + 0 = a Multiplication

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Zero Property of Multiplication Anything times 0 equals 0.

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Multiplication Property of -1 If you multiply by -1 the sign will change.

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Example 1 Which property is illustrated by each statement? A. Answer: Zero Property of Multiplication B. Answer: Associative Property of Addition C. Answer: Identity Property of Addition

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Example 2 A movie ticket costs $6.75. A drink costs $1.90. Popcorn costs $2.25. What is the total cost for a ticket, a drink, and popcorn? Use mental math. Answer: $10.90

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Assignment Pg. 29-31 # 7-18, 47-55 odd

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