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102 Identify & assign Variable Lesson

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102 Identify & assign Variable Lesson

1. 1. Identify and assign variables 10/25/09 Algebra 1.1 Bitsy Griffin
2. 2. Essential Question <ul><li>How do I identify and assign variables? </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin
3. 3. Vocabulary <ul><li>Equations & Inequalities </li></ul><ul><ul><li>Complete mathematical sentences. </li></ul></ul><ul><li>Term (Terms) </li></ul><ul><ul><li># </li></ul></ul><ul><ul><li>Variable </li></ul></ul><ul><ul><li>Product/quotient of a number </li></ul></ul><ul><ul><li>Product/quotient of a number & variable </li></ul></ul><ul><ul><li>Separated by a + or a - </li></ul></ul>10/25/09 Algebra 1.1 Bitsy Griffin
4. 4. Term Examples 10/25/09 Algebra 1.1 Bitsy Griffin
5. 5. # of Terms? 10/25/09 Algebra 1.1 Bitsy Griffin
6. 6. Problem 1 <ul><li>The weight of the truck is two times the weight of the car. </li></ul><ul><li>Assign the Variables: </li></ul><ul><ul><li>Truck </li></ul></ul><ul><ul><li>Car </li></ul></ul><ul><ul><li>Is </li></ul></ul><ul><ul><li>Equation </li></ul></ul>10/25/09 Algebra 1.1 Bitsy Griffin <ul><ul><li>> T </li></ul></ul><ul><ul><li>> C </li></ul></ul><ul><ul><li>> = </li></ul></ul><ul><ul><li>> 2C=T OR T=2C </li></ul></ul>
7. 7. Problem 2 <ul><li>Four quarts are equal to one gallon. </li></ul><ul><li>Assign the variables: </li></ul><ul><ul><li>Quarts </li></ul></ul><ul><ul><li>Gallons </li></ul></ul><ul><ul><li>Equation </li></ul></ul>10/25/09 Algebra 1.1 Bitsy Griffin <ul><ul><li>> Q </li></ul></ul><ul><ul><li>> G </li></ul></ul><ul><ul><li>> 4Q=G OR G=4Q </li></ul></ul>
8. 8. Problem 3 <ul><li>The mass of Jupiter is 317.8 times the mass of Earth. </li></ul><ul><li>Assign the variables </li></ul><ul><li>Write the equation </li></ul><ul><ul><li>> J=317.8 E </li></ul></ul>10/25/09 Algebra 1.1 Bitsy Griffin
9. 9. Write Equations 1 <ul><li>Tapes= </li></ul><ul><li>Cost= </li></ul><ul><li>Equation = </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin <ul><li>T </li></ul><ul><li>C </li></ul><ul><li>C=7.50T </li></ul>Tapes Cost 1 7.50 2 15.00 3 22.50 4 30.00
10. 10. Write Equations 2 <ul><li>Hours= </li></ul><ul><li>Pay= </li></ul><ul><li>Equation = </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin <ul><li>H </li></ul><ul><li>P </li></ul><ul><li>P=7H </li></ul>Hours Pay 4 28.00 6 42.00 8 56.00 10 70.00
11. 11. Write Equations 3 <ul><li>Gallons= </li></ul><ul><li>Miles= </li></ul><ul><li>Equation = </li></ul><ul><li>M=25G </li></ul><ul><li>This is an odd equation. </li></ul><ul><li>We usually think in miles per gallon. </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin Gallons Miles 3 75 5 125 7 175 9 225
12. 12. Write Equations 4 <ul><li>Pizzas Eaten= </li></ul><ul><li>Pizzas Left = </li></ul><ul><li>Equation = </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin <ul><li>PE </li></ul><ul><li>PL </li></ul><ul><li>PL=25 - PE </li></ul><ul><li>This one wasn’t so easy! I had to notice that it was subtraction! </li></ul>Pizzas Eaten Pizzas Left 0 25 6 19 9 16 18 7
13. 13. Review <ul><li>Variable </li></ul><ul><li>Expression </li></ul><ul><li>Equation </li></ul><ul><li>Variable Expression </li></ul><ul><li>Term </li></ul><ul><li>Inequality </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin
14. 14. Essential Question <ul><li>How do I identify and assign variables? </li></ul>10/25/09 Algebra 1.1 Bitsy Griffin