Perform the addition: 685 + 146

Quick explanation:

Step-by-step solution:

1. Step 1: Add the ones column: 5 + 6 = 11. Write down 1 and carry over 1 to the tens column.
2. Step 2: Add the tens column: 8 + 4 + 1 (carry-over) = 13. Write down 3 and carry over 1 to the hundreds column.
3. Step 3: Add the hundreds column: 6 + 1 + 1 (carry-over) = 8.

Answer: 831