The Three Meanings of Subtraction - Math Video
This video explains the three ways of thinking about subtraction (taking away, finding the difference, and whole/parts) and explains which one is best and why. I also talk briefly about why counting strategies are not as effective as visualization of quantities. There will be more on this topic in a later video. Once again, Cuisenaire rods come to the rescue and make everything easy. They are a treasure. If you don't yet have some, go buy them!!! |
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