Believe it or not: 23 +60 = 1

Question

Below are equations, left as is, that are not true.  You need to put units to the numbers to make the equations true.  For example: 23 + 60 = 1 because 23 hours + 60 minutes equals 1 day.  Solve:

3+2+1=1

11+3+7=1

2+12= 1

5+5=2

11+1=1

Answer 1

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