Solve 569 + 431: Three-Digit Addition Practice

To solve this problem, let's use vertical addition as follows:

• Step 1: Align the numbers by their place values:
  $569$
  + $431$

• Step 2: Start with the units column:
  Add $9 + 1 = 10$. Write 0 in the units place and carry over 1 to the tens column.

• Step 3: Move to the tens column:
  Add $6 + 3 = 9$, then include the carried 1, making it $9 + 1 = 10$. Write 0 in the tens place and carry over 1 to the hundreds column.

• Step 4: Finally, the hundreds column:
  Add $5 + 4 = 9$, then add the carried 1, making it $9 + 1 = 10$. Write 0 in the hundreds place and put 1 in the next column (thousands, a new place in this context).

The sum of the numbers is, thereby:
$1000$

Therefore, the total is $1000$.