1. Lesson 4-2 Pages 153-157 Powers and Exponents Lesson Check 4-1

2. What you will learn! 1. How to write expressions using exponents. 2. How to evaluate expressions containing exponents.

3. BaseExponent Power Standard form Expanded form

4. What you really need to know! A number that is expressed using an exponent is called a power. The exponent tells you how many times to use the base as a factor. 3 4 = 3 x 3 x 3 x 3

5. What you really need to know! Expressions involving powers are evaluated using order of operations. Powers are evaluated after any grouping symbols and before other multiplication or division operations.

7. Example 1: Write each expressions using exponents. 6666= 6 4

8. Example 2: Write each expressions using exponents. p= p 1

9. Example 3: Write each expressions using exponents. (-1)(-1)(-1)= (-1) 3

10. Example 4: Write each expressions using exponents. (5x + 1)(5x + 1) (5x + 1) 2

11. Example 5: Write each expressions using exponents.

12. Example 6: Express 235,016 in expanded form. (2 x 10 5 ) + (3 x 10 4 ) + (5 x 10 3 ) + (0 x 10 2 ) + (1 x 10 1 ) + (6 x 10 0 )

13. Example 7: 4242 Evaluate each expression. = 44= 16

14. Example 8: r 3 – 3 if r = -2 Evaluate each expression. (-2) 3 – 3 -8 – 3 -11

15. Example 9: x(y + 2) 2 if x = 2 and y = -2 2(-2 + 2) 2 2(0) 2 2(0) 0

16. Page 155 Guided Practice #’s 4-11

18. Pages 153-155 with someone at home and study examples! Read:

19. Homework: Pages 155-157 #’s 12-56 even #’s 60-75 Lesson Check 4-2

25. Page 731 Lesson 4-2

26. Lesson Check 4-2