1. Warm Up: You’ve won! For a door prize, you get to choose between the two options shown. Which is the better prize? Why? Lesson 1-2 Order of Operations and Evaluating Expressions

2. Simplifying Powers: An expression like x n is called a ________________ and is read “x to the _____ ______________.” x is called the ______________ (the number being multiplied) and the n is called the _______________ (it tells how many times the base is used as a factor.) power nth base exponent

3. 1st 4th 3rd 2nd 5th times cubed squared 8 8 8 ● n ● n ● n ● n ● n 8 ● 8 ● 8 ● 8 8● 8● 88● 8● 8 8 ● 8 Depends on the value of “n” 4096 512 64

4. Evaluating Powers There is a link on the last side demonstrating how to use the graphing calculator to evaluate problems with exponents. 2●2 ●2 ●2 ●2 ●2 4●4 ●4 64 32,768

5. Practice:

6. Simplifying a Numerical Expression grouping symbols innermost parentheses ( )brackets [ ] braces { } fraction bar radical sign exponents additionsubtraction left right multiplicationdivision left right

7. 48 ÷ 8 ● 3 + 5 6 ● 3 + 5 18 + 5 23 18 + 8 – 3 26 – 3 23 6 + 4 – 6 10 – 6 4

8. 5● 3(5) 15 (5) 75 7 + 64 – 2 71– 2 69

9. = 2

13. Using the Graphing Calculator http://screencast-o-matic.com/watch/cIQi23V5Yt Click on the link below watch example using the graphing calculator. When you are done, you will be finished with this lesson