Like most of you, I was taught there is one way to subtract, and that's the way we do it! About ten years ago, I was floored to learn that there are actually many ways to subtract - and some of them turned out to be easier/quicker for me than the "regular way" (called the "standard algorithm" in educational speak)!
Take a look at this short clip showing four different ways to subtract the same numbers. If I were to do this while standing in line at the store, I probably wouldn't use the standard algorithm, I would do some type of funky number shuffling in my head - I'm guessing that you would, too. After you watch it, ask yourself...are any of those ways a visual of what I actually do in my head? Comments are closed.
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Mrs. SilcoxWelcome! I am the Math Specialist at Providence Creek Academy Archives
May 2018
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