Solve the following addition and subtraction problems: 299 + 583 = ?

Solution:

1. Addition:

     299
   + 583
   -----

2. Step 1: Add the ones column: 9 + 3 = 12. Write down 2, carry over 1.
3. Step 2: Add the tens column: 9 + 8 + 1 (carry-over) = 18. Write down 8, carry over 1.
4. Step 3: Add the hundreds column: 2 + 5 + 1 (carry-over) = 8. Write down 8.

Final Answer: 882