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Transparency 2 Click the mouse button or press the Space Bar to display the answers.

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Presentation on theme: "Transparency 2 Click the mouse button or press the Space Bar to display the answers."— Presentation transcript:

1

2 Transparency 2 Click the mouse button or press the Space Bar to display the answers.

3 Splash Screen

4 Example 2-2b Objective Estimate square roots

5 Example 2-2b Math Symbols Approximately 

6 Lesson 2 Contents Example 1Estimate Square Roots Example 2Estimate Square Roots

7 Example 2-1a Write the problem Estimate to the nearest whole number. 1/2 Think of the perfect square less than 54 7  7 = 49  49 Add the < sign <  64 Bring down Think of the perfect square greater than 54 8  8 = 64 Add the < sign <

8 Example 2-1a Determine which number 54 is closer to Estimate to the nearest whole number. 1/2  49 <  54 <  64 54 - 49 = 5 64 - 54 = 10 54 is closer to 49 So  54 is estimated to 7 7 Answer:

9 Example 2-1b Answer: 8 Estimate to the nearest whole number. 1/2

10 Example 2-2a FINANCE If you were to invest $100 in a bank account for two years, your money would earn interest daily and be worth more when you withdrew it. If you had $120 after two years, the interest rate, written as a decimal, would be found using the expression Find the value. 2/2 Write the problem

11 Example 2-2a Answer: The interest rate = 10% 2/2 Follow order of operations PEMDAD Inside the parenthesis find the square root 10.96 Bring down rest of expression 10.96 - 10 10 Subtract in numerator.96 10 Divide numerator by denominator 0.096 Round to hundredths (2 places to the right of the decimal) Remember: interest rate is percent so multiply decimal by 100 for percent 0.10 10%

12 Example 2-2b Answer: Interest rate = 20% FINANCE If you were to invest $100 in a bank account for two years, your money would earn interest daily and be worth more when you withdrew it. If you had $150 after two years, the interest rate, written as a decimal, would be found using the expression * 2/2

13 End of Lesson 2 Assignment Lesson 3:2 Estimating Square Roots 10 - 33 All


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