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arwan1953 (Jul 26, 2022), baja (Aug 7, 2022), EnginePaul (Jul 27, 2022), Inner (Jul 30, 2022), JoeVanGeaux (Jul 27, 2022), Moby Duck (Jul 31, 2022), nova_robotics (Jul 26, 2022), odd one (Jul 27, 2022), Sleykin (Jul 28, 2022), that_other_guy (Aug 5, 2022)
Sleykin (Jul 28, 2022)
Or 99 x 99.
Gonna be drawing a lot of lines and counting a lot of intersections. I fail to see any advantages to their system.
99 x 99 = (100 -1) x (100 -1) = 100 x 100 - 200 + 1 = 9800 + 1 = 9801
would seem a lot simpler - can even do that one in your head.
76 x 47 = (80 - 4) x (50 - 3) = 4000 - 240 - 200 + 12 = 3560 +12 = 3572
Ok, a bit more difficult but still simpler than drawing all those lines.
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Regards, Marv
Experience is always far worse than pessimism
Frank S (Jul 31, 2022)
The awkwardness of computation using Roman numerals probably accounts for the Romans' use of the abacus.
The Roman abacus was similar to modern ones but had some additional columns at the right...
The Wikipedia article provides a full description of the device and its use...
https://en.wikipedia.org/wiki/Roman_abacus
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Regards, Marv
Experience is always far worse than pessimism
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