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RE: Ancient Egyptians were really good at Math - an easy way to multiply two numbers
That is quite clever for smaller numbers, say two digit numbers, but I think it gets hard quite quickly with larger numbers.
For example I tried 633 x 323. 633 is harder to work out on the numberline:
(1)
2
4
(8)
(16)
(32)
(64)
128
256
(512)
Then the 323 doubling each time gets tricky to do quite quickly:
323
646
1292
2584
5168
10336
20672
41344
82688
165376
Does it work? Yes it does, but even adding up all of the numbers is fairly complicated:
| 633 | 323 |
|---|---|
| (1) | 323 |
| 2 | 646 |
| 4 | 1292 |
| (8) | 2584 |
| (16) | 5168 |
| (32) | 10336 |
| (64) | 20672 |
| 128 | 41344 |
| 256 | 82688 |
| (512) | 165376 |
323 + 2,584 + 5,168 + 10,336 + 20,672 + 165,376 = 204,459
633 x 323 = 204,459
I think I'll stick with long multiplication.
Thanks for sharing, that was very interesting as you can probably tell by the fact I tried it myself.
Yes, you are right. (Most of my posts are just for a bit of fun, though.)
Your reply has more content than the whole of my post. :)
Sorry, I have been known to waffle!
No, it was a really good reply. I was just pointing to the fact that most of my posts are not as in-depth as they should be.