1-2 Exponents and Order of Operation Textbook page 9

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 = exponent base power

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

Simplify:  Simplify exponents first  5. 9 – 13  Then multiply  45 – 13  Then subtract  32

Simplify: ÷  Simplify Exponents first  ÷  Then divide   Then add  29

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

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

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

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 =  Simplify  C =  C =  Remember this should be a realistic PRICE  C = $37.09

Assignment # 2  Beginning on Textbook page 12  Problems all, all, all, all, odd  Write all problems except 79 & 80  Do not pack up until told to do so by the teacher.