1. 1-2 Exponents and Order of Operation Textbook page 9

2. Terminology  To simplify an expression is to replace it with its simplest name. The simplest name for 2+5 is 7  An exponent tells how many times the base is used as a factor. A power has two parts, a base and an exponent. 2 3 = 2. 2. 2 exponent base power

3. Order of Operations  P  E  M D  A S arentheses xponents woring from the inside to the outside ultiply &ivide left to right dd &ubtract left to right

4. Simplify: 5. 3 2 - 13  Simplify exponents first  5. 9 – 13  Then multiply  45 – 13  Then subtract  32

5. Simplify: 21 + 49 ÷7 + 1 3  Simplify Exponents first  21 + 49 ÷ 7 + 1  Then divide  21 + 7 + 1  Then add  29

6. Simplify: 6 [13 – 2 (4 + 1)]  Simplify innermost parentheses first  6 [13 – 2. 5]  Then multiply inside the parentheses  6 [13 – 10]  Then subtract inside the parentheses  6. 3  Then multiply  18

7. Evaluate for a = 5, b = 12, c = 2  a + b + 2c  Substitute values for the variables  5 + 12 + 2. 2  Simplify, multiply first  5 + 12 + 4  Then add  21

8. Evaluate for a = 5, b = 12, c = 2  b 2 – 4a  Substitute values for the variables  12 2 – 4. 5  Simplify exponents first  144 – 4. 5  Then multiply  144 – 20  Then subtract  124

9. C = p + r. p Where C is the total cost of a purchase, p is the price and r is the sales tax rate written as a decimal  Find the total cost of a coat priced $34.99 if the sales tax is 6%  C = p + r. p  Substitute (remember to write the percent as a decimal)  C = 34.99 +.06. 34.99  Simplify  C = 34.99 + 2.0994  C = 37.0894  Remember this should be a realistic PRICE  C = $37.09

10. Assignment # 2  Beginning on Textbook page 12  Problems 21-40 all, 51-53 all, 77-80 all, 83-88 all, 89-105 odd  Write all problems except 79 & 80  Do not pack up until told to do so by the teacher.