DO NOW Copy down your homework: 1-2 Lesson Check (Page 13) Warm-up: Look at the glossary in the back of your book and define these words in the “Chapter 1 Vocabulary” section at the back of your notebook 5. Power 6. Exponent 7. Base 8. Simplify 9. Evaluate

HW

Table of contents 1 Page # topic date 5 Ch. 1 – Getting Ready 1/22/15 ? 1-1 Variables & Expressions 1/26/15 ? 1-2 Order of Operations & 1/27/15 Evaluating Expressions 1

page 10 HINT

VS

How do we read powers? 5. Power: The base and the exponent of an expression in the form an. 6. Exponent: A number that shows repeated multiplication. 7. Base: A number that is multiplied repeatedly.

How do we read powers? What do they mean to do? 23

How do we read powers? What do they mean to do? 52

How to simplify 8. Simplify: To replace an expression with its simplest form. Simplify: 5 x 3 =

What is the simplified form of the expression? 107 (0.2)5

You Try!!!

Order of Operations

Please Excuse My Dear Aunt Sally Also Known as P.E.M.D.A.S Please Excuse My Dear Aunt Sally

P.E.M.D.A.S foldable Parentheses (and grouping symbols) Exponents Multiply and Divide from Left to right Add and Subtract from Left to right

P parentheses E exponents M D multiply divide A S add subtract

Example 𝟏𝟐 parentheses exponent divide 𝟏𝟕 −𝟐𝟓÷𝟓 subtract 𝟏𝟕 −𝟓 𝟏𝟕 − 𝟓 𝟐 ÷(𝟐+𝟑) exponent 𝟏𝟕 − 𝟓 𝟐 ÷𝟓 divide 𝟏𝟕 −𝟐𝟓÷𝟓 subtract 𝟏𝟕 −𝟓 𝟏𝟐

Simplify: 2 4 −1 5 6−2 3 ÷2

You Try!!!

Evaluating Expressions

Evaluating Expressions 9. Evaluate: To substitute a given number for each variable and then simplify. for x = 5 and y = 2 𝑥 2 +𝑥−12÷ 𝑦 2

Evaluating Expressions 𝑥𝑦 2 for x = 5 and y = 2

You Try!!!

You Try!!!