1 + 11 equals 12.
In mathematics, when you add numbers together, you're combining them to find a total. In this case, when you add 1 and 11 together, you're essentially combining one unit (1) with eleven more units (11). When you do this addition operation, you find that the total number of units is 12. Therefore, 1 + 11 equals 12. It's a fundamental arithmetic operation where you're aggregating quantities to find a sum.
