Multiplying Integers

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# Multiplying Integers - PowerPoint PPT Presentation

Multiplying Integers. Lesson 2-4, p. 83. Rules. When multiplying integers with like (the same) signs, the product (answer) will be positive. EX.) negative x negative = positive positive x positive = positive 5 * 3 = ____ (-5) * (-3) = ____

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### Multiplying Integers

Lesson 2-4, p. 83

Rules
• When multiplying integers with like (the same) signs, the product (answer) will be positive.
• EX.) negative x negative = positive
• positive x positive = positive
• 5 * 3 = ____
• (-5) * (-3) = ____
• When multiplying integers with different signs, the product (answer) will be negative.
• EX.) negative x positive = negative
• positive x negative = negative
• (-5) * 3 = ____
• 5 * (-3) = _____
Multiplying with more than two factors
• When multiplying more than two factors, count the number of negative integers:
• *If you have an odd number of negative integers, then your product (answer) will also be negative.
• *If you have an even number of negative integers, then your product (answer) will be negative.
• TRY THESE:
• Negative Positive Positive Negative
Multiplying with Variables
• Sometimes you will be asked to simplify. Sometimes you will be asked to evaluate.
• When asked to simplify, you will not be able to solve the problem out to a numerical answer. Your answer will have a variable in it.