Khan Academy

Description: Sal uses place value, the distributive property, associative property, and an area model to show more ways to multiply. That, hey look, if I have seven of anything, and here I have seven thousands, and I multiply that by six, I'm now going to have seven times six of that thing, or 42 of that thing, and in this case we have 42 thousands. So you might just be able to cut to the chase and say, hey look, six times seven thousands is going to be 42 thousands. And that's great if you can just cut to the chase like that, and another way to think about it is like, look, six times seven is 42, and then since we're talking about thousands, we're not just talking about seven, we're talking about seven thousands.

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