1. TEXAS ALGEBRA I, LESSON 3 VERBAL EXPRESSIONS & OPEN SENTENCES Instructor: Mrs. Young

2. LESSON OBJECTIVES: PLACE TEKS HERE The student will be able to: 1.Define open sentence 2.Define a variable for a given (verbal) situation 3.Write a verbal expression for a given algebraic expression. 4.Write an algebraic expression for a given verbal expression.

3. WHAT IS A OPEN SENTENCE? A mathematical statement with one or more variables.

4. WRITE AN ALGEBRAIC EXPRESSION Remember example 1 from lesson 1? If there are 4,000 widgets in a mile, how long is a widget (in inches)? Write an algebraic expression to represent the highlighted verbal expression. 1.Define your variable  Choose variables that help you remember what they represent  Be specific! 2.Look for key words within your verbal expression.  Restate the sentence if it helps! 3.Write your open sentence  test sentence for truth value

5. LET’S TRY ONE MORE! There are one hundred eighty-seven days in a school year. 1.Define your variable  d = the number of days ; s = 1 school year 2.Look for key words within your verbal expression.  1 school year is 187 days 3.Write your open sentence  s = 187d  test sentence for truth value

6. HUH? SPEAK ENGLISH!! Ok…you win! Write a verbal expression for the given algebraic expressions.  10n = f  365d = y  3p = h  12e =d

7. HUH? SPEAK ENGLISH!! Ok…you win! Write a verbal expression for the given algebraic expressions.  10n = f There are ten nickels in a fifty cent piece.  365d = y There are three hundred sixty-five days in a year.  1/2d = 6 One half of a dozen is six.  2g = 288 The are two hundred eighty-eight units in two gross.

8. LESSON OBJECTIVES: The student will be able to: 1.Define open sentence 2.Define a variable for a given (verbal) situation 3.Write a verbal expression for a given algebraic expression. 4.Write an algebraic expression for a given verbal expression.