2 is defined to be the number that is 1 more than 1, so that 1 + 1 = 2 by definition.
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When you are using non-standard definitions of "plus" and "minus", or of "equal".
if the question u are asking is something like this 1/2 - ( - 1/2 ) then the answer is simple all you have to do is solve the equation like this 1/2 - ( - 1/2 ) = 1/2 + 1/2 = 2/2 = 1 its the - (-1/2) that is important remember the rule minus and minus equal plus plus and plus equal plus minus and plus equal minus remember and i hope it helps :)
1 + 1 = 2
2
Yes.