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http://www.mathslideshows.com

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Small Square Value = 1 Rectangle x 1 1 1 Value = x Large Square x x Value = x 2 Algebra Tiles

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http://www.mathslideshows.com Small Square Value = -1 Rectangle -x 1 1 Value = - x Large Square -x x Value = -x 2 Algebra Tiles

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http://www.mathslideshows.com We are going to use Algebra Tiles to solve algebraic equations. Algebra Tiles

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http://www.mathslideshows.com = An Equation is like a balance scale. Everything must be equal on both sides.

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http://www.mathslideshows.com = What you do to one side of an equation, you must do to the other side to keep it balanced.

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http://www.mathslideshows.com = 3x = 5 What Equation Is This?

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http://www.mathslideshows.com = x + 2 =3 What Equation Is This?

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http://www.mathslideshows.com = x - 1 = 2 What Equation Is This?

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http://www.mathslideshows.com = -x - 3 = 4 What Equation Is This?

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http://www.mathslideshows.com = 2 = x - 2 What Equation Is This?

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http://www.mathslideshows.com = 4x-2=2x+3 What Equation Is This?

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http://www.mathslideshows.com = -3x-2= -x-1 What Equation Is This?

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http://www.mathslideshows.com You are going to get a set of algebra tiles to use and a balance scale worksheet. Do NOT write on the balance scale worksheet. I am going to reuse it.

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http://www.mathslideshows.com =

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Clear your desk ! You will only need your algebra tiles, and your balance scale worksheet. You will only need the xs and 1s not the x 2

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http://www.mathslideshows.com = Show me what x + 2 = 4 looks like.

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http://www.mathslideshows.com Lets try to solve x + 2 = 4. = What can I take away from both sides? Take away +2 from both sides. x = 2

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http://www.mathslideshows.com Show me what 2x + 1 = 3 looks like. =

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http://www.mathslideshows.com Lets solve 2x + 1 = 3 = What can I take away from both sides? Take away +1 from both sides. If 2x = 2, how do I solve? Divide both sides in half. x = 1

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http://www.mathslideshows.com Show me what x - 2 = 3 looks like. =

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http://www.mathslideshows.com Lets try to solve x - 2 = 3. = I want to get x all by itself. Add +2 to both sides. What happens to -2 + (+2) They make 0 so take them away. x = 5 How do I get rid of -2 ?

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http://www.mathslideshows.com Take Out Your Study Guide!!!

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http://www.mathslideshows.com Algebra Tile Equations 2x + 2 = 4 #9 + + + Take away 2 from both sides. Divide both sides in half. 2x = 2 2 2 x = 1 = Algebra 2x + 2 = 4 -2 = -2 x x Draw a picture. + +

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http://www.mathslideshows.com Algebra Balance Scales #10 + + + + x x x + + 2) Take away 2x from both sides. 3) Take away 4 from both sides. 6 = 1x + 4 -4 2 = x = 2x + 6 = 3x + 4 1) Draw a picture. x x Algebra 2x + 6 = 3x + 4 -2x = -2x + +

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http://www.mathslideshows.com Name______________ Date_______________ Period___ Lets start your homework. Put your name, date and period on your handout. You are going to do the problems with your algebra tiles 1 st ! Solving Equations With Algebra Tiles Then you will draw the problem. Then you will write the algebra equation and solve.

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http://www.mathslideshows.com Show me problem #1 x + 3 = 6 = Take +3 away from both sides. Draw this on your homework paper x = 3

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http://www.mathslideshows.com Draw problem #1 x + 3 = 6 + + + ++ + = + + + Write the algebra steps! x + 3 = 6 - 3 x = 3 3 + 3 = 6 6 = 6

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http://www.mathslideshows.com Show me problem #2 x – 3 = 2 = Add +3 to both sides. Draw this on your homework paper x = 5 What happens to -3 + (+3) ? They make 0 so take them away.

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http://www.mathslideshows.com D raw problem #2 x – 3 = 2 - + - + = - Add +3 to both sides. ++ + ++ + Cross off your zeros Algebra x - 3 = 2 +3 x = 5 5 - 3 = 2 2 = 2

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http://www.mathslideshows.com Show me problem #3 2x + 1 = 5 = What can I take away from both sides? Take away +1 from both sides. If 2x = 4, how do I solve? Divide both sides in half. x = 2

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http://www.mathslideshows.com Draw problem #3 2x + 1 = 5 + + + = + Take away +1 from both sides Divide both sides in half. ++ Algebra 2x + 1 = 5 -1 -1 2x = 4 2(2) + 1 = 5 2 2 x = 2 4 + 1 = 5 5 = 5

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http://www.mathslideshows.com S how me problem #4 4 = 2x – 2 = What can I add to both sides? Add +2 to both sides. If 6 = 2x, how do I solve? Divide both sides in half. x = 3 What happens to -2 + (+2) ?

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http://www.mathslideshows.com Draw problem #4 4 = 2x – 2 + + + = - Add +2 to both sides. Divide both sides in half. + - + + ++ -2 + (+2) equal zero. Algebra 4 = 2x - 2 +2 +2 6 = 2x 4 = 2(3) - 2 2 2 3 = x 4 = 6 - 2 4 = 4

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http://www.mathslideshows.com Put your algebra tiles back in your bag and ziplock them. Pass your tiles forward quickly. Pass up your balance scale worksheet.

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http://www.mathslideshows.com Teacher Note : Use the next slide as a master. Make one copy for each student to use as a placemat when using the algebra tiles for solving equations as a hands on model.

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http://www.mathslideshows.com =

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If you have trouble viewing you need MathType software: To see all math formulas correctly you need to install MathType software, similar to equation editor and is available for free at Design Science website.Design Science website

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http://www.mathslideshows.com For more information on Math Slideshows visit: http://www.mathslideshows.com/ http://www.mathslideshows.com/

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