Warm Up Multiply or divide. 1. 5(8) 40 2. 6(12) 72 36 9 49 7 3. 4 4. 7 192 16 12 5. 18(7) 126 6.

Example 1: Multiplying and Dividing Integers Multiply or divide. –18 2 A. –6(4) C. –24 –9 –25 –5 B. –8(–5) D. 40 5

Check It Out: Example 1 Multiply or divide. –24 3 A. 5(–2) C. –10 –8 –12 –2 B. –3(–2) D. 6 6

Example 2: Using the Order of Operations with Integers Simplify. A. 3(–6 – 12) C. –2(14 – 5) 3(–18) –2(9) –54 –18 B. –5(–5 + 2) –5(–3) 15

Check It Out: Example 2 Simplify. A. 2(1 – 8) C. –3(6 – 9) 2(–7) –3(–3) –14 9 B. 4(–3 – 8) 4(–11) –44

Example 3: Sports Application A golfer plays 5 holes. On 3 holes, he is 4 strokes over par. On 2 holes, he is 1 stroke under par. Each score over par can be represented by a positive integer, and each score under par can be represented by a negative integer. Find the total score relative to par. 3(4) + 2(–1) Add the losses to the gains. 12 + (–2) Multiply. 10 Add. The total score is 10 strokes over par.

Check It Out: Example 3 A golfer plays 9 holes. On 3 holes, he is 3 strokes over par. On 4 holes, he is 3 stroke under par. Each score over par can be represented by a positive integer, and each score under par can be represented by a negative integer. Find the total score relative to par. 3(3) + 4(–3) Add the losses to the gains. 9 + (–12) Multiply. –3 Add. The total score is 3 strokes under par.

1. –8(4) –32 2. 6 3. –2(13 – 4) –18 4. 6(–5 – 3) –48 $40 Lesson Quiz Multiply or divide. 1. –8(4) –32 2. –12(5) –10 6 Simplify. 3. –2(13 – 4) –18 4. 6(–5 – 3) –48 5. Evin completes 11 transactions in his bank account. In 6 transactions, he withdraws $10. In 5 transactions, he deposits $20. Find the total net change in dollars. $40