Lesson 2 Adding Three Digit Numbers with Step by Step Solutions

Start by grouping the numbers according to their place values. Begin with the rightmost column (ones), then move leftwards, adding the digits in the hundreds, tens, and ones places. Always carry over any value greater than ten to the next column.

For example, when adding 243 and 578, first add the ones place: 3 + 8 = 11. Write down the 1 and carry over the 1 to the tens place. Next, add the tens: 4 + 7 + 1 (the carry-over) = 12. Write down the 2 and carry over the 1 to the hundreds. Finally, add the hundreds: 2 + 5 + 1 (the carry-over) = 8. The total sum is 821.

Always ensure you follow these steps systematically. This method helps prevent errors and simplifies the process of adding large numbers. Practicing this method will build confidence and improve accuracy with more complex addition problems in the future.