Lesson 1-2 Pages 12-16 Numbers and Expressions Lesson Check 1-1.

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Presentation transcript:

Lesson 1-2 Pages Numbers and Expressions Lesson Check 1-1

What you will learn! 1. How to use the order of operations to evaluate expressions. 2. How to translate verbal phrases into numerical expressions.

Numerical expression Evaluate Order of operations

Order of operations: 1. Simplify the expression inside grouping symbols. 2. Do all multiplication / division from left to right. 3. Do all addition / subtraction from left to right. What you really need to know!

PEMDAS Parentheses Exponents Multiplication / Division Addition / Subtraction

AdditionSubtractionMultiplicationDivision plusminustimesdivided sumdifferenceproductquotient more than less than multipliedper increased by subtracteachrate in all decreased by ofratio lessfactorsseparate What you really need to know! What the words really mean!

Examples: Verbal Phrase Key Word Expression 5 times 8 5 times 8times 5 x 8 the sum of 2 and 4 sum the quotient of 16 and 2 quotient 16 ÷ 2 6 less than 8 less than 8 – 6 the product of 2 and 5 product 2 x 5 5 less 2 less 5 – 2

Example 1: Find the value of the expression: x

Example 2: 24 ÷ 8 x 3 3 x 3 9

Example 3: 5(4 + 6) – 7 7 5(10) – – – 49 1

Example 4: 3[(18 – 6) + 2(4)] 3[12 + 2(4)] 3[12 + 8] 3[20] 60

Example 5:

Example 6: Write a numerical expression: The quotient of eighteen and six 18 ÷ 6

Example 7: Write a numerical expression: The sum of nine and five 9 + 5

Example 8: Write and evaluate an expression: Madison earns an allowance of $5 per week. She also earns $4 per hour babysitting 6 hours each week. How much money does she earn in one week? x 6 ; $29

Page 14 Guided Practice #’s 4-12 Link to Pre-Made Lesson

Pages with someone at home and study examples! Read:

Homework: Pages #’s even #’s #’s Lesson Check 1-2

Page 724 Lesson 1-2