# Mr. Menjivar. Pre-Algebra Development Table of Contents DateTitle Page # 08/15/11Pre-Algebra Activity Training1 08/17/11Variables and Expressions2 08/18/11Order.

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Mr. Menjivar

Pre-Algebra Development Table of Contents DateTitle Page # 08/15/11Pre-Algebra Activity Training1 08/17/11Variables and Expressions2 08/18/11Order of Operations3

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard:

Number Sense 1.2: Add, subtract, multiply, and divide rational numbers.

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard: Objective:

To use the order of operations To use grouping symbols Why learn this: To find the value of an expression with more than one operation

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard: Objective: Vocabulary:

Is a rule use to clarify which procedures should be performed first in a given numerical or algebraic expression.

Find the value of the expression 3 + 5 × 2 What answer do you get if you add first? What answer do you get if you multiply first? How does the order in which you do the operations affect your answer?

To begin, work within parentheses ( ), then brackets [ ], and then braces { } from innermost and work outward. They are known as grouping symbols. For example: 2{1 + [4(2+1) + 3]} the answer is 32 Simplify exponents and roots working from left to right. Do multiplication and division, whichever comes first left to right. Do addition and subtraction, whichever comes first left to right.

PE MDMD ASAS

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard: Objective: Vocabulary: Notes/Examples:

1. 4 + 15 ÷ 3 9 2. 8 – 2 3 2 3. 35 ÷ 7 – 2 3 4. 3 + 6 × 4 27

1. 3 5 – 8 ÷ 4 + 6 19 2. 4 – 1 2 + 6 ÷ 3 4 3. 5 + 6 4 ÷ 3 – 1 12 4. 7 + 3 (8 ÷ 4) 13 5. 2(15 – 9) 9 108

A submarine starts at sea level. It dives 130 feet, rises 90 feet, and then dives by 3 times the first amount. Write and simplify the numerical expression.

Mr. Menjivar deposit two checks for \$30 and three checks for \$15. Then Mr. Menjivar withdrew \$20 to pay bills. What is Mr. Menjivars balance?

Break Time!

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard: Objective: Vocabulary: Notes/Examples: Independent Practice:

Order of Operations 3R 3L 08/18/11 Order of Operations Reflection 08/18/11 Observe, Question, Comment Warm-Up:Standard: Objective: Vocabulary: Notes/Examples: Independent Practice: Assignment #3: