1. Do Now 11/15/11 Take out your HW from last night. Take out your HW from last night. Text p. 102, #10-40 evens, #42, 43, 48, & 49 Text p. 102, #10-40 evens, #42, 43, 48, & 49 Copy HW in your planner. Copy HW in your planner. Text p. 106, #10-44 evens Text p. 106, #10-44 evens In your journal, estimate an answer to the following situation. Potato salad costs $0.99 per pound at the deli counter. About how much do you think 6.5 pounds of potato salad will cost? In your journal, estimate an answer to the following situation. Potato salad costs $0.99 per pound at the deli counter. About how much do you think 6.5 pounds of potato salad will cost?

2. Homework Text p. 102, #10-40 evens, #42, 43, 48, & 49 10) 39.05 10) 39.05 12) 16.917 12) 16.917 14) 15.33 14) 15.33 16) 9.071 16) 9.071 18) 2.24 18) 2.24 20) 12.79 20) 12.79 22) 4.47 22) 4.47 24) 31.15 24) 31.15 26) 8.25 minutes 26) 8.25 minutes 28) -0.338 28) -0.338 30) -17.361 32) -125.55 34) 48.46 36) 30.623 38) -2.6 40) 1,642.5 miles 42) 1.6 °F 43) 1915 48) B 49) G

3. Objective SWBAT multiply decimals SWBAT multiply decimals

4. To multiply decimals, multiply as you would integers. To place the decimal point in the product count the number of decimal places in each factor. The product will have the same number of decimal places as the sum of the decimal places in the factors. Section 3-2 Multiplying Decimals

5. Find the product. 3.06 x 1.4 3.06 3.06 1224 x 1.4 x 1.4 How many decimal places are in each number? 2 decimal places 1 decimal place +3060 4284 How many decimal places are in the sum of both numbers? 3 decimal places will then be in the product! 4.284

6. 12 12 48 x 4 1.2 1.2 4.8 x 4 x 4 0.12 0.12 48 48 x 0.4 x 0.4 000 000 0.048 How many decimal places are in the factors? Do you see a pattern? How many decimal places are in the products?

7. Practice 1) 1.46 x 0.02 2) 3.04 x 1.6 1)1.46 x 0.02 0.0292 2)3.04 x 1.6 1824 _+3040 4.864

8. “Multiplying Integers” Rule #1 The product of two integers with the same sign is always POSITIVE! 8 x 3 = 24 -8 · (-7) = 56 Rule #2 The product of two integers with different signs is always NEGATIVE! -6 x 3 = -18 8(-4) = -32 Remember this?

9. Estimating Round each decimal to the nearest integer than find the product. 7.2(-4.36) -28 -11.3 x 7.76 -88 -3.3(-3.3) 9 -7.3(-6.72) 49

10. Find the product. -2.78 · 0.8 -2.78 -2.78 x 0.8 x 0.8 How many decimal places are in each number? 2 decimal places 1 decimal place -2224 How many decimal places are in the sum of both numbers? 3 decimal places will then be in the product! -2.224

11. Find the product. -16 x 0.014 0.014 0.014 0084 x -16 How many decimal places are in each number? 3 decimal places 0 decimal places +0140 -0224 How many decimal places are in the sum of both numbers? 3 decimal places will then be in the product! -0.224

12. “Real-Life” On average, Americans eat 0.25 lb of peanut butter per month. How many pounds of peanut butter are eaten by approximately 302 million Americans living in the United States per month? 302 x 0.25 75.50 75.50 million pounds of peanut butter are eaten by Americans each month 1510 6040 6040

13. 24 Homework Text p. 106, #10-44 evens