3-6 Multiplying Decimals Warm Up Problem of the Day

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Presentation transcript:

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

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 2. 943  800 754,400 3. 3,806  10 38,060 4. 1,207  100 120,700 5. 72  196 14,112 6. 120  523 62,760

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

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

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 3.062 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!

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

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 2.012 for x. 5x = 5(2.012) 3 decimal places 2.012 + 0 decimal places  5 10.060 3 decimal places

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

Insert Lesson Title Here Course 1 3-6 Multiplying Decimals Insert Lesson Title Here Lesson Quiz Find each product. 1. 0.8 2. 0.006  0.07 Evaluate 8x for each value of x.  0.07 0.056 0.00042 3. x = 2.705 4. 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