4.4+Dividing+Integers++0910

S.B.K Math 7B April 27, 2010 **Big Idea Negative numbers help us to model many real world situations. Essential Question #4: How do I multiply and divide integers? ** Notes from Class: When multiplying integers, if there is even number of negative numbers, the answer is positive. If there is odd number of negative numbers, the answer is negative. Problem 4.4 Dividing Integers -5 × 6 = -30. Since it's negative multiplied by positive, the answer is negative. -60 ÷ 20 = -30 -120 ÷ 40 = -30 -8 × -4 = 32 Negative multiplied by negative is positive. 64 ÷ 2 = 32 -64 ÷ -2 = 32 -132 ÷ 12 = -11. In order to solve a multiplication problem with division, switch the numbers around. -56 ÷ -8 = 7 132 ÷ -4 = -33 8.84 ÷ 5.2 = 1.7 -8 × -3 = 18. In order to solve a division problem with multiplication, switch the numbers around. 91 ÷ -7 = -13 11 × -17 = -187 -19.95 ÷ 9.95 = -2.1 -121 ÷ 11 = -11. Negative divided by positive is negative. 121 ÷ -11 = -11 -96 ÷ -4 = 24. Negative divided by negative is positive. 96 ÷ 4 = 24. Positive divided by positive is positive. 18 ÷ 3 = 6 The answer to these problems is the same number, but for -18 ÷ 3 and 18 ÷ -3 it’s negative instead of positive.
 * A. ****1. Complete the multiplication sentence -5****×****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****×****-4 = ?:**
 * 2. Write two division sentences that are equivalent to the multiplication sentence you found in part 1:**
 * C. Write a division sentence that solves each problem:**
 * 1. ?** **×** **12 = -132:**
 * 2. -8** **×** **? = -56:**
 * 3. ?** **×** **-4 = 132:**
 * 4. 5.2** **× ? = -8.84**
 * D. Write a division or a multiplication sentence that solves each problem:**
 * 1. ****? ÷ -3 = -8:**
 * 2. ****91 ÷ ? = -7**
 * 3. ****? ÷ 11 = -17:**
 * 4. ****-19.95 ÷ ? = 9.5:**
 * Problem 4.4 Follow Up**
 * 1. ****Find each quotient:**
 * a. ****-121 ÷ 11**
 * b. ****121 ÷ -11**
 * c. ****-96 ÷ -4**
 * d. ****96 ÷ 4**
 * 2. ****a. Find 18 ÷ 3**
 * b. How does your answer from part a help you find -18 ÷ 3, 18 ÷ -3, and -18 ÷ -3?:**


 * [[image:math7c-2008:EJC_Square.png caption="EJC_Square.png"]] ||