Multiplying 3-Digit Numbers by 11
If you can multiply 11 by any 2-digit number, then you can easily do any three digit number. There’s just an extra step, and make sure you always start adding near the ones so you can see where to carry the extra if needed.
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Howdy howdy. I just stumbled onto the Math section. I’m not sure how I missed it until last week, but I did. This is just way too cool. thanks, j
No problem – we’ll be adding a new video each week or two, and we’ve only just started, so you’re right on track. I think the next one to come up is squaring numbers. By December, your kids should be able to multiply 3 digit numbers in their head… and some kids will actually figure out how to do this faster than a calculator. We’ll be going over the math phonetic code as well as how to graphically multiply, so it will be a nicely-rounded tour of math and how to use it in everyday life. It’s fun, isn’t it?
Thanks for these math tricks! I teach a math class to home school kids and these are really fun!