OK, this is genius how to teach children multiplication. Use your "hand calculator" to figure 8 and 9 multiplication tables. Where was this when I was in school? (Also, this is a crazy long video for such a simple concept.
This is how they are teaching in the schools I have been in. Great math hack for your kids! I wish I knew this in elementary school. I don't teach multiplication any more this is a great idea for those few facts kids just have a tough time memorizing.
Times table trick using your hands: To multiply x by y, where x and y are both integers in the range 6 to 10 inclusive, you work out (x - 5 + y - x 10 + - x) - y). It can be seen that this = + - 100 + 100 - - + xy = xy
Using LEGOs to teach Math! Love this use of manipulatives! Plus, the kids will think they are playing a game.: Using LEGOs to teach Math! Love this use of manipulatives! Plus, the kids will think they are playing a game.