4.4+Dividing+Integers+0910

TJ 7E
 * 4/25/10

Big Idea: Negative numbers help us to model many real world situations. Essential Question: How do I multiply and divide integers. Notes from class: **
 * When dividing two positive integers the answer is always positive
 * When dividing two negative integers the answer is always positive
 * When dividing a positive integer and a negative integer, the answer is always negative

__Problem 4.4__ The multiplication sentence is: -5 x 6 = -30. The division sentences are : -5 = -30 ÷ 6, and 6 = ** -30 **÷ -5. The multiplication sentence is: -8 x -4 = 32.
 * A. 1. Complete the multiplication sentence -5 x 6 =?**
 * 2. Write two division sentences that are equivalent to the multiplication sentence you found in part 1.**
 * B. 1. Complete the multiplication sentence -8 x -4 =?**
 * 2.** Write two division sentences that are equivalent to the multiplication sentence you found in part 1.
 * The division sentences are:** -8 = 32 ÷ -4, and -4 = 32 ÷ -8.

**2. -8 x ? = -56 : -8 = -56 ** ÷ 7
 * C. Write a division sentence that solves each problem.**
 * 1. ? x 12 = -132 :** -132 ÷ -12 = -11
 * 3. ? x -4 = 132 :** 132 ÷ -4 = -33
 * 4. 5.2 x ? = -8.84 :** 5.2 = -8.84 ÷ 1.7

**1. ?** **÷ -3 = -8 :**  **2.**  **91 ÷ ? = -7 :** - 13 x -7 = 91 **4. -1** **9.95 ÷ ? = 9.5 :** - 2.1 x 9.5 = -19.95
 * D. Write a division or multiplication sentence that solves each problem.**
 * 3**. **? ÷ 11 = -17 :**

__Problem 4.4 Follow-Up__ a. -121 ÷ 11** = -11
 * 1. Find each quotient.
 * b.** **121 ÷ -11** = -11
 * c.** **-96** **÷ -4** = 24
 * d. 96÷ 4** = 24

18 ÷ 3 is 6. It helps you to find **-18 ÷ 3, 18 ÷ -3, and -18 ÷ -3** because it already gives you the answer but you just need to determine whether they are positive or negative.
 * 2. a. Find 18 ÷ 3**
 * b. How does your answer from part a help you find -18 ÷ 3, 18÷ -3, and -** **18÷ -3**?