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.
Waldorf ~ grade ~ Math ~ Fractions ~ Butterfly Method ~ add or subtract fractions the butterfly way. Adding the visuals really helps the ideas stick, learn your fractions now and higher math will be much easier!
Fractions can be a very hard thing to understand. By using this fraction wall in the classroom, teachers will not only have an easier way to teach but students will visually be able to see just how fractions work.
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