Lesson 4-1 Pages 150-152 Writing Expressions and Equations.

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Lesson 4-1 Pages Writing Expressions and Equations

What you will learn! How to write verbal phrases and sentences as simple algebraic expressions and equations.

What you really need to know! What operation is meant by certain words. AdditionSubtractionMultiplicationDivision plusminustimesdivided sumdifferenceproductquotient more thanless thanmultipliedper increased bylesstwiceseparate in alldecreased byeach

Examples of Expressions and Equations:PhraseExpression 9 more than a number the sum of 9 and a number a number plus 9 a number increased by 9 the total of x and 9 x + 9

Examples of Expressions and Equations:PhraseExpression 6 multiplied by g 6 times a number the product of g and 66g

Examples of Expressions and Equations:PhraseExpression 4 subtracted from a number a number minus 4 4 less than a number a number decreased by 4 the difference of h and 4 h - 4

Examples of Expressions and Equations:PhraseExpression a number divided by 5 the quotient of t and 5 divide a number by 5

Example 1: Write the phrase twenty dollars less the price of a movie ticket as an algebraic expression. Use m to represent the movie ticket. 20 – m

Example 2: Write each sentence as an algebraic equation. A number less 4 is 12. Use n for the number. n – 4 = 12

Example 3: Write each sentence as an algebraic equation. Twice a number is 18. Use n for the number. 2n = 18

Example 4: An average American adult drinks more soft drinks than any other beverage each year. Three times the number of gallons of soft drinks plus 27 is equal to the total 183 gallons of beverages consumed. Write an equation that models this situation. Use g for the gallons. 3g + 27 = 183 An average American adult drinks more soft drinks than any other beverage each year. Three times the number of gallons of soft drinks plus 27 is equal to the total 183 gallons of beverages consumed. Write an equation that models this situation.

Page 151 Guided Practice #’s 3-9

Pages with someone at home and study examples! Read:

Homework: Page 152 #’s 10-25, 28 #’s Lesson Check 4-1

Page 572 Lesson 4-1

Lesson Check 4-1