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

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

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.

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.

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

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

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

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

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

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

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

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

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 –

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

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