HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Section 1.8.

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HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Section 1.8 Order of Operations

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Objectives o Follow the rules for order of operations to evaluate expressions.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Rules for Order of Operations 1.Simplify within grouping symbols, such as parentheses ( ), brackets [ ], and braces { }, working from the innermost grouping outward. 2.Find any powers indicated by exponents. 3.Moving from left to right, perform any multiplications or divisions in the order they appear. 4.Moving from left to right, perform any additions or subtractions in the order they appear.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Rules for Order of Operations Other grouping symbols are the absolute value bars (such as|3 + 5|), the fraction bar (as in ), and the square root symbol (such as ). Notes

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Rules for Order of Operations Even though the mnemonic PEMDAS is helpful, remember that multiplication and division are performed as they appear, left to right. Also, addition and subtraction are performed as they appear, left to right. Notes

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 1: Order of Operations with Integers Use the rules for order of operations to evaluate each of the following expressions. Solution Exponents. Divide and multiply, left to right. Subtract.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 1: Order of Operations with Integers (cont.) Solution Exponents. Subtract inside the parentheses. Multiply. Subtract (or add algebraically).

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 1: Order of Operations with Integers (cont.) Solution Exponents. Multiply inside the parentheses. Subtract inside the parentheses. Divide inside the brackets.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 1: Order of Operations with Integers (cont.) Note: Because of the rules for order of operations at no time did we even subtract 9 − 2. Add inside the brackets. Multiply. Add.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions Use the rules for order of operations to evaluate each of the following expressions. Solution Change the mixed number to an improper fraction and find the LCD in the parentheses.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions (cont.) Divide and reduce. Add within parentheses.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions (cont.) Solution Exponents. Divide, then multiply and reduce.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions (cont.) Find the LCD. Add.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions (cont.) Solution Divide. Multiply and reduce.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 2: Order of Operations with Fractions (cont.) Simplify. Find the LCD. Subtract.

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 3: Order of Operations with Decimals (using Calculators) Graphing calculators are programmed to use the rules for order of operations. Use your graphing calculator to find the value of each of the following expressions. Note that the key gives the exponent 2. Solution

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Example 3: Order of Operations with Decimals (using Calculators) (cont.) Solution

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Use the rules for order of operations to evaluate each expression. Practice Problems

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Simplify. Practice Problems (cont.)

HAWKES LEARNING SYSTEMS Students Matter. Success Counts. Copyright © 2013 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. Practice Problem Answers 1.   83. 