1.1 words and expressions Objective: Students should be able to demonstrate they know the order of operations and how to apply it. They should know what a numerical expression is and how to write one.

Definitions Evaluate: Solve to get a numerical value. Numerical expression: numbers and operations. Ex: 2 + 5 – 4 Verbal model: use math symbols and apply to words. Key Words: Addition: sum Subtraction: difference Multiplication: of, product Division: quotient

Examples of verbal expression Tell me what math you would use. Product of Increased by Divided into Decreased by Write out as a math problem. 30 increased by 5 The product of 5 and 6 The difference of 10 and 7

Write as numerical expression –st. Product of 41 and 2 17 more than 3. Quotient of 20 and 2 Sum of 6 and 7

Definitions/Order Order of Operations: solve more than one operation. Parentheses: ( ), { } Exponents: x3, x2 Multiply: x / Divide: / Add: + / Subtract: - HELPER: Parenthesis = Please Exponents = Excuse Multiply = My Divide = Dear Addition = Aunt Subtract = Sally

Grouping Symbols / Examples Kinds: Brackets { } Parenthesis ( ) Fraction bars / Do in this order!!! Note: have division need to rewrite. Ex: 4 + 5 3 - 2 Write as (4 + 5) / (3 – 2) 40 – (52 – 2) 18 - 6 7 - 4

Teacher Examples 9 x 7 + 30 / 3 12 – 2 x 7 41 x (7 + 3) x 2 18 – 42 + 1

Student Example 4{15 – (2 + 5)} 7.8 + 2.2 7 - 5 5 (3) + 3(1.1) 7 - 5 5 (3) + 3(1.1) 5(14 – 32)

Wrap up Any questions or concerns. Hw: wkbk. Pg. 1 #1-8, wksht