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Warm-Up Exercises Find the product. 4.4 Multiply Integers STD NS () 147 () 1512 () 86 () 5

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Warm-Up Exercises Find the product. 4.4 Multiply Integers ANSWER 98 ANSWER 180 ANSWER () 147 () 1512 () 86 () 5

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Lesson 4.4 Multiplying Integers Multiplying Two Integers The product of two non-zero integers with the same sign is positive. The product of two non zero integers with different signs is negative. The product of zero and any integer is zero.

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Lesson 4.4 Multiplying Integers Multiplying More Than Two Non-Zero Integers The product is positive if it has an even number of negative factors. The product is neagative if it has an odd number of negative factors.

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Example 1 Multiplying Integers a. () 9 – 6 – b. () 3 7 – c. () 0 5 –

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Find the product. 1. () 6 5 – 2. () 1 – 12 – 3. () 11 – 7 – 4. () 0 5 – Practice for Example 1

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Multiplying More Than Two Integers Example 2 a. 3 () 2 – () 5 – b. () 4 – () 3 – 9 – c. () 10 – () 27

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Find the product. 5. () 2 3 – () 4 – 6. () 685 () – () 1 – () 3 – 8. () 47 () 2 – Practice for Example 2

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Example 3 Comparing Integer Products a. () 4 – 3 ? () 3 – () 4 – b. 5 ? () 8 – 7 – 6 –

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Example 4 Evaluating Variable Expressions with Integers Evaluate 2a b 2 = – 12 – 4.4. – = and b when a

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Copy and complete the statement using. 9. () 3 – 10 – () 11 – 4 ? ? 5 3 – 3 – Practice for Examples 3 and 4

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Evaluate the expression when a, b, and c – = 1 – == bca– 12. bac– 13. a 2a 2 b– 14. c 2c 2 ab– Practice for Examples 3 and 4

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Using Integer Multiplication Example 5 A store sells 200 notebooks at a below-cost price to attract customers. The loss on each notebook is 9 cents. This can also be represented as a negative profit, cents. Find the store's profit on the sale of the 200 notebooks. 9 –

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15.An airplane descends 4 feet per second as it lands. Find the change in the airplane's altitude after 8 seconds. Practice for Example 5

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Lesson 4.4 Multiplying Integers Homework 4.4: workbook; p.94/1-38

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