Completing the square
14:06
Completing the square
Feb 20, 2011
Khan AcademySal Khan,CK-12 Foundation
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If completing the square has ever seemed overwhelming or confusing… let me show you how it’s done with algebra tiles! I’ll be honest… I learned to complete the square without algebra tiles. And it just seemed like a bunch of steps to get an answer. It didn’t seem to make sense. But with algebra tiles.. you are literally completing a square. If you’ve been torn on whether or not to use algebra tiles, let this video convince you to try them with your students. I have a longer video that goes more
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Seeing area as two dimensional square units is very important when moving on to complex polygons. Base and height need to be seen as creating a right angle to ensure the formation of square units. #mathematics #mathtutor #geometry #area | Superteacherguy
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The area model should always be connected to the standard algorithm so students truly understand where the zero in the second row comes from. What do you think? | Superteacherguy
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The area model math pennant I posted yesterday got some comments about it being confusing. I wanted to (hopefully!) clear up some of it with a quick area model fraction multiplication video. It’s a step-by-step method, so I can see how just seeing the final result could be a bit🤔. In this short video, 3/4 is multiplied by 1/2. It’s a lot like finding the area of a rectangle, except instead of using the entire length and width, we only use a fraction of each. This method always works, even with
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