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?? Humpleupagus ?? (humpleupagus@eveningzoo.club)'s status on Friday, 15-Dec-2023 21:40:36 JST?? Humpleupagus ?? I learned my multiplication tables by memorizing half and then filling in the other half by subtraction.
For example
9x9 = 9x10 - 9x1
9x8 = 9x10 - 9x2