STUDENT ANNOUNCEMENTS Any student wanting to become involved with HYDROHigginsville Youth Directing Realistic Opportunities please turn in your information sheet to Mrs. Rhoad or to Teri Ray at the Chamber of Commerce Office. HYDRO Organization Meeting and BBQ will be on SUNDAY, Aug 22 at 5:00 at Fairground Park, RSVP to Teri at the Chamber Office or to Mrs. Rhoad. LL Football – register by Friday, August 20th for 6th grade. Information packets in the office. LL Football Cheerleading – register by Friday, August 20th for 6th grade. Information packets in the office. School pictures will be Wednesday, August 25 Thursday, August 19 Pre-Algebra Fill in Planner – Assignment: Practice 1-1 (Enrichment 1-1 is extra credit) Agenda for today – Distribute Textbooks (15 minutes) – Complete textbook scavenger hunt (10 minutes) – Notes (25 minutes) – Group Practice (15 minutes) – Independent work on assignment (21 minutes) Bell Ringers 1. 1 week = _7_ days 2. 1 foot = _12_ inches 3. 1 nickel = _5_ cents 4. 1 gallon = _4_ quarts 5. 1 yard = _3_ feet Scavenger Hunt Answers 1. 2. 3. 4. 5. 6. 7. Solving Equations and Inequalities Scientific Notation Red 30 2007 Dilbert An integer greater than 1 with exactly 2 positive factors, 1 and the number itself. 8. quarters Objective for Today’s Lesson Students will be able to identify variables, numerical expressions, and variable expressions. Also, students will be able to write variable expressions for words and phrases. Why is this important? Definitions 1. Variable: A letter that stands for a number that is unknown. (Ex. x+3; x is a variable) 2. Numerical expression: A mathematical phrase that uses numerals and operation symbols. (Ex 7+3; 7+3 is a numerical expression) 3. Variable expression: A mathematical phrase that uses variables, numerals, and operation symbols. (Ex. x+3; x+3 is a variable expression) Identify each expression as a numerical or a variable expression. For a variable expression, what is the variable? 8 x 55 d 43 9 100 6 c5 Numerical Variable Write a variable expression for each word phrase 9 y 1. Nine more than a number y 2. 4 less than a number n n4 3. A number z times three z 3 4. A number a divided by 12 5. 5 times the quantity 4 plus a number c 5(4 c) a 12 Rags to Riches Measurement. Write an expression for each quantity. 1. The number of days in 4 weeks 74 2. The number of days in w weeks 7w 3. The number of pounds in 160 ounces 4. The number of pounds in z ounces 160 16 z 16 Objective for Today’s Lesson Students will be able to identify variables, numerical expressions, and variable expressions. Also, students will be able to write variable expressions for words and phrases.