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  • 22:13, 29 January 2022 0kelvin talk contribs created page Properties of the absolute value (Created page with "We all learn at school that a number is either positive or negative, with positive numbers not requiring a plus sign because it's the standard everywhere in the world. We always assume a number without a sign to be positive. Now textbooks that I had at school and the teachers that I had back then would always say that modulus ''"erases"'' the sign. I always felt that operation to be meaningless because if a number has no sign, does it mean that the number is neither posi...")