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I see what you’re saying, using one hand for the entire sequence. XI is still a pain. The real problem is that there is no mention of doing this in any Roman text. A bit of an omission, or was it a state secret?
IV and IX don’t make sense when it could be done more intuitively by IIII and VIIII.
Fewer axe marks.
IIII = 4 IV = 3
IX = 3 VIIII = 6
Sure, but OP is talking about fingers as representation, not markings. Your point is exactly why they did it in writing.
If thumb and index make V, then there’s only 3 fingers left.
I see what you’re saying, using one hand for the entire sequence. XI is still a pain. The real problem is that there is no mention of doing this in any Roman text. A bit of an omission, or was it a state secret?
I read that’s how it was done for math, the exception being things like headlines.