596888 +866899

To solve the addition problem 596888 + 866899, you can follow these steps:

1. Start by adding the rightmost digits 8 + 9, which equals 17.
2. Write down the 7, and carry over the 1 to the next column.
3. Add the next set of digits, 8 + 9 + 1 (carried over), which equals 18.
4. Write down the 8, and carry over the 1 to the next column.
5. Add the next set of digits, 6 + 8 + 1 (carried over), which equals 15.
6. Write down the 5, and carry over the 1 to the next column.
7. Add the next set of digits, 5 + 6 + 1 (carried over), which equals 12.
8. Write down the 2, and carry over the 1 to the next column.
9. Finally, add the remaining 1 + 8 (carried over), which equals 9.
10. Write down the 9.
11. The final sum is 1,463,787.

Therefore, 596888 + 866899 = 1,463,787.