C H 1.2 – O RDER OF O PERATIONS AND E VALUATING E XPRESSIONS.

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Presentation transcript:

C H 1.2 – O RDER OF O PERATIONS AND E VALUATING E XPRESSIONS

L ET ’ S R EVIEW ! Write an algebraic expression for the following phrases less than the product of 3 and a number t. 2. Twice the sum of a number b and 8.

T RY TO TRANSLATE THE ALGEBRAIC PHRASE INTO A VERBAL PHRASE – (d / 6) 2. (x + 7) / 2

N EW V OCABULARY Power: made of two parts, a base and an exponent. Base: the number you are multiplying by itself in a power. Exponent: how many time you multiply the base to itself.

V OCABULARY 4. Simplify: a numerical expression when you it with its single numerical value. 5. Evaluate: replacing each variable with a given number, then simplify the expression.

W HAT IS THE SIMPLEST FORM FOR THE FOLLOWING EXPRESSIONS (⅜) 4

W HICH ONE IS CORRECT ? W HY ? A) x 5 = 5 x 5 = 25 B) x 5 = = 17

O RDER OF O PERATIONS 1. Perform operations inside grouping symbols. Grouping symbols: parenthesis, brackets, absolute values, fraction bars 2. Simplify powers. 3. Multiply and divide left to right. 4. Add and subtract left to right.

S IMPLIFY 1) 2) 3) 17 – 36 / 4

W HAT IS THE VALUE OF THE FOLLOWING EXPRESSIONS FOR X = 3 AND Y = x + y 2 – xy 2. (y – x) + 4(xy)

E VALUATE THE EXPRESSIONS FOR A = 2 AND B = 6 1. (a + b) 2 2. a 2 + b 2 3. What can you say about #1 and #2?

H OMEWORK Order of Operations Worksheet There are no algebraic expressions. SHOW ALL YOU WORK!! (or no credit!) Make sure you know how to write algebraic expressions from verbal phrases!!!!!