3 ms·
The way the article shows is essentially calculating: (30 + 6) * (20 + 4) Which is great and all, but I think it would make more sense to do this: (24 * 6) *
by randrews 16y ago
The way the article shows is essentially calculating:
(30 + 6) * (20 + 4)
Which is great and all, but I think it would make more sense to do this:
(24 * 6) * 1 + (24 * 3) * 10
This is a lot closer to how machines actually do multiplication, so if the goal is to conceptually understand multiplication so you can have a computer do it, that makes more sense to me.
Plus it's easier to do in your head that way.
- flogic 16y agoMy inclination would be to be much less computer like about it. First start with some observations about the numbers. 24 is one less than 25. 4 * 25 is 100. 36 is 9 * 4. Therefor the answer is (9 * 100)-36=864. Numbers have properties. You can use these properties to do less mental work or at least take up less mental temp space. Not sure how you teach people to do that.