1. 1.6 Multiplying/Dividing Numbers Reciprocal: The flipped rational number of a given number. Multiplicative Inverse: The flipped rational number of a given number used in multiplication.

2. GOAL:

3. 1. (x) = multiply, times, product of: the product of 3 and 5  (3)5 2. (/) = division, quotient, fraction: The quotient of 3 and 5  3/5 In math we always translate English words into symbols:

4. When we multiply real numbers there are a few rules we must remember:

5. Ex: What is each number? A) 3(-2) - 6 = B) -3(-2)  (2)(3) since (-)(-)  + = 6

6. Key Concept:

8. REAL-WORLD: Your parents have provided you with a $1000 saving account. You want to buy clothes for school and you make a five withdrawals of equal amounts from your bank. The total amount you withdraw is $360. What is the change in your account balance each time you make a withdrawal?

9. Solution: Due to the fact that you are making equal withdrawals with a total of $360 we have: $360 / 5  $72 each time Thus our bank statement will show $ -72 each time we made the withdrawal.

10. YOU TRY IT: Find the quotient.

11. Solution: In math we never divide fractions but we do use the keep- change-flip method.

12. VIDEOS: Multiplication and Division Negatives: http://www.khanacademy.org/math/arithmetic/abs olute-value/mult_div_negatives/v/multiplying- positive-and-negative-numbers

13. CLASSWORK: Page 42-44: Problems: As many as it takes you to master the concept