Solve Three-Digit Addition: 548 + 459 in Vertical Format

To solve this problem, we'll follow these steps:

• Step 1: Add the units digits of both numbers.
• Step 2: Handle any regrouping if necessary and add the tens digits.
• Step 3: Handle any regrouping if necessary and add the hundreds digits.

Now, let's work through each step:

Step 1: Add the units digits of both numbers:
$8 + 9 = 17$. Here, 7 is placed in the units place, and 1 is carried over to the tens column.

Step 2: Add the tens digits along with the carry-over:
$4 + 5 + 1 = 10$. Here, 0 is placed in the tens place, and 1 is carried over to the hundreds column.

Step 3: Add the hundreds digits along with the carry-over:
$5 + 4 + 1 = 10$. Here, 0 is placed in the hundreds place, and 1 is carried over to the thousands column.

The final sum is $1007$, where 1 is now the digit in the thousands place.

Therefore, the solution to the problem is $1007$.