1. 3-6 Multiplying Decimals Warm Up Problem of the Day
Course 1
Warm Up
Problem of the Day
Lesson Presentation

2. 3-6 Multiplying Decimals Warm Up Multiply. 1. 87  320 27,840
Course 1
3-6
Multiplying Decimals
Warm Up
Multiply.
1. 87  320
27,840
 800
754,400
3. 3,806  10
38,060
4. 1,207  100
120,700
5. 72  196
14,112
 523
62,760

3. 3-6 Multiplying Decimals Problem of the Day
Course 1
3-6
Multiplying Decimals
Problem of the Day
Carmen and Rita sold homemade oatmeal cookies. After 8 days, they had sales totaling $70. Each day, their sales were $0.50 higher than the previous day. What were their sales on the first day?
$7.00

4. 3-6 Multiplying Decimals
Course 1
3-6
Multiplying Decimals
Learn to multiply decimals by whole numbers and by decimals.

5. Additional Example 3A: Evaluating Decimal Expressions
Course 1
3-6
Multiplying Decimals
Additional Example 3A: Evaluating Decimal Expressions
Evaluate 5x for each value of x.
A. x = 3.062
Substitute for x.
5x = 5(3.062)
3 decimal places
3.062  5
+ 0 decimal places
15.310
3 decimal places
These notations all mean multiply 3 times x.
3 • x 3x 3(x)
Remember!

6. Additional Example 3B: Evaluating Decimal Expressions
Course 1
3-6
Multiplying Decimals
Additional Example 3B: Evaluating Decimal Expressions
B. x = 4.79
Substitute 4.79 for x.
5x = 5(4.79)
2 decimal places
4.79
+ 0 decimal places  5
23.95
2 decimal places

7. 3-6 Multiplying Decimals  Try This: Example 3A
Course 1
3-6
Multiplying Decimals
Try This: Example 3A
Evaluate 5x for each value of x.
A. x = 2.012
Substitute for x.
5x = 5(2.012)
3 decimal places
2.012
+ 0 decimal places  5
10.060
3 decimal places

8. 3-6 Multiplying Decimals  Try This: Example 3B B. x = 6.22
Course 1
3-6
Multiplying Decimals
Try This: Example 3B
B. x = 6.22
Substitute 6.22 for x.
5x = 5(6.22)
2 decimal places
6.22  5
+ 0 decimal places
31.10
2 decimal places

9. Insert Lesson Title Here
Course 1
3-6
Multiplying Decimals
Insert Lesson Title Here
Lesson Quiz
Find each product.
 0.07
Evaluate 8x for each value of x.
 0.07
0.056
3. x = x = 0.804
21.64
6.432
5. “Pick your own” peaches sell for $0.95 per pound. You picked 92 pounds of peaches. How much were you charged?
$87.40