(+0.5)+(+21)=
The given mathematical expression is (+0.5)+(+21). Let us solve this step by step:
- Step 1: Recognize equivalency: 21 in decimal form is 0.5.
- Step 2: Rewriting the expression: (+0.5)+(+0.5).
- Step 3: Direct addition: 0.5+0.5=1.
Both terms are positive, and hence they add directly without altering each other's sign, resulting in a total of 1. Therefore, the solution is 1.