Expression:
5 + 5 + 5 ÷ 5
We must respect the order of operations: division comes before addition.
Step 1 — Perform the division:
5 ÷ 5 = 1
The expression becomes:
5 + 5 + 1
Step 2 — Perform the additions:
5 + 5 = 10
10 + 1 = 11
Final answer: 11
The trap is to directly calculate 5 + 5 + 5 = 15, then divide by 5. There are no parentheses around the entire addition, so this calculation would be incorrect.
5 + 5 + 5 ÷ 5 = 11