Mathematics, 09.10.2021 14:00 tieragroff

Why are the tables symmetric about the diagonal from the upper-left corner to the lower-right? For example, why is the entry in the third row of the second column equal to the entry in the second row of the third column? Would a subtraction table be symmetric about the same diagonal?

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Why are the tables symmetric about the diagonal from the upper-left corner to the lower-right? For e...

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