©Evergreen Public Schools 2010 1 Solve Equations with Variables on One Side Teacher Notes Still use algebra tiles! Students write and solve equations from.

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Presentation transcript:

©Evergreen Public Schools Solve Equations with Variables on One Side Teacher Notes Still use algebra tiles! Students write and solve equations from word problems.. Supplies Each student needs a bag of algebra tiles. 7/14/11

©Evergreen Public Schools Learning Target Target 3a I can write an equation to solve a problem. What do you think this means? Can you give an example?

©Evergreen Public Schools LaunchLaunch Solve. Remember from last year. 3 x = 6 2 x + 1 = 7 Be prepared to share your work…

©Evergreen Public Schools

5 The left side of an equation is equal to the right side.

©Evergreen Public Schools The left side of an equation is equal to the right side.

©Evergreen Public Schools The left side of an equation is equal to the right side. 25¢ =

©Evergreen Public Schools Get a piece of blank paper Fold it in half hamburger style. Use the fold to divide the 2 sides of the equation.

©Evergreen Public Schools Use Algebra Tiles to Solve Cindy, my sister, read two more books than me. She read 5 books. How many did I read? What are you asked to find? Define x: Write an equation to solve the problem.

©Evergreen Public Schools Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

©Evergreen Public Schools Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Keep it balanced. Do exactly the same to both sides of the equation. Books I read.Books Cindy read.

©Evergreen Public Schools What did I just do? Did I keep it balanced? Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

©Evergreen Public Schools What is the solution? I read 3 books. Cindy, my sister, read two more books than me. She read 5 books. How many did I read? Books I read.Books Cindy read.

©Evergreen Public Schools I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? What are you asked to find? Define x: Write an equation to solve the problem. Use Algebra Tiles to Solve

©Evergreen Public Schools I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? How can I get x alone and still keep the equation balanced? Remove zero pairs Before lunchAfter lunch

©Evergreen Public Schools I had $4 before lunch. I used 3 one-dollar bills when I bought lunch. After lunch, I had 1 one-dollar left in my wallet. How many one-dollar bills did I have before lunch? Before lunchAfter lunch

©Evergreen Public Schools  Check it: x = 4 x + (-3) = 1 11=  :-)

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? What are you asked to find? Define x: Write an equation to solve the problem. Use Algebra Tiles to Solve

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools How can we solve for 1 x ? John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools John buys games for 2 months. = John has 4 video games. He has a goal to buy 3 each month until he has 10 games. How many months does he need to buy games to reach his goal? John’s GamesJohn’s Goal

©Evergreen Public Schools  Check it: x = 2 3 x + 4 = =  :-)

©Evergreen Public Schools Debrief Write what you know about using algebra tiles to solve a problem.

©Evergreen Public Schools Learning Target Did you hit the target? Target 3a I can write an equation to solve a problem. Rate your understanding of the target from 1 to 5. 5 is a bullseye!

©Evergreen Public Schools Practice Practice 2.5____

©Evergreen Public Schools Solve with algebra tiles. Lizzy bought 4 pens with a $10 bill and got $2 in change. What was the average she spent on each pen? What are you asked to find? Define x: Write an equation to solve the problem.