1. 3-4 Multiplying Decimals I CAN multiply decimals by decimals.

2. 3-4 Multiplying Decimals Example 1: Science Application Something that weighs 1 lb on Earth weighs 0.17 lb on the Moon. How much would a 4 lb dumbbell weigh on the Moon? 0.17  4 0.68 Place the decimal point by adding the number of decimal places in the numbers multiplied. A 4 lb dumbbell on Earth weighs 0.68 lb on the Moon. 2 decimal places + 0 decimal places 2 decimal places

3. 3-4 Multiplying Decimals You Try! Example 1 Something that weighs 1 lb on Earth weighs 0.17 lb on the Moon. How much would a 7 lb dumbbell weigh on the Moon? 0.17  7 1.19 Place the decimal point by adding the number of decimal places in the numbers multiplied. A 7 lb dumbbell on Earth weighs 1.19 lb on the Moon. 2 decimal places + 0 decimal places 2 decimal places

4. 3-4 Multiplying Decimals Example 2: Multiplying a Decimal by a Decimal Find the product. A. 0.3  0.4 Multiply. Then place the decimal point. 0.3 0.4  1 decimal place + 1 decimal place2 decimal places 0.12

5. 3-4 Multiplying Decimals Example 2: Multiplying a Decimal by a Decimal B. 0.07  0.8 0.07  0.8 2 decimal places + 1 decimal place3 decimal places; use a placeholder zero 0.056

6. 3-4 Multiplying Decimals Example 2: Multiplying a Decimal by a Decimal C. 1.34  2.5 1.34 2.5  2 decimal places + 1 decimal place3 decimal places 670 2680 3.350

7. 3-4 Multiplying Decimals You Try! Example 2 Find the product. A. 0.5  0.2 Multiply. Then place the decimal point. 0.5 0.2  1 decimal place + 1 decimal place2 decimal places 0.10

8. 3-4 Multiplying Decimals You Try! Example 2 B. 0.03  0.9 Multiply. Then place the decimal point. 0.03 0.9  2 decimal places + 1 decimal place3 decimal places; use a placeholder zero 0.027

9. 3-4 Multiplying Decimals You Try! Example 2 C. 3.8  3.3 Multiply. Then place the decimal point. 3.8 3.3  1 decimal place + 1 decimal place2 decimal places 114 1140 12.54

10. 3-4 Multiplying Decimals CAN YOU multiply decimals by decimals?

11. 3-4 Multiplying Decimals Lesson Quiz Find each product. 1. 0.8  0.07 2. 0.006  0.07 0.00952 0.056 $87.40 3. “Pick your own” peaches sell for $0.95 per pound. You picked 92 pounds of peaches. How much were you charged?

12. 3-4 Multiplying Decimals HOMEWORK pp. 114-115: 1-5 odd, 12-20 even, 49,51