Quick explanation:
Brief explanation: To add two numbers, we align them vertically by place value and add each column starting from the right, carrying over when a sum exceeds 9.
Step-by-step solution:
- Step 1: Add the ones column: 7 + 7 = 14. Write down 4 and carry over 1 to the tens column.
- Step 2: Add the tens column: 4 + 7 + 1 (carry-over) = 12. Write down 2 and carry over 1 to the hundreds column.
- Step 3: Add the hundreds column: 1 + 4 + 1 (carry-over) = 6.
Answer: 624