1. State the problem: Evaluate $2+5+200-0.5+3.6$.\n2. Formula: For addition of real numbers we add each term.\n\n$$S = a_1 + a_2 + \dots + a_n$$\n3. Important rules: align decimal places when adding decimals and keep track of positive and negative signs.\n4. Compute integer sum: $2 + 5 + 200 = 207$.\n5. Compute decimal sum: $-0.5 + 3.6 = 3.1$.\n6. Add the two results: $207 + 3.1 = 210.1$.\n7. Final answer: $210.1$.\n