In the following exercise, you will add a pair of three-digit numbers.

**Things to remember:**

- The numbers are stacked on top of each other, so that the numbers in the one’s place are in the far-right column.
- The numbers in the ten’s place are in the middle column.
- The numbers in the hundred’s place are in the left column.

**Steps:**

- Start by adding the one’s place column.
- If the number is larger than 9, then you need to write the one’s place number and then “carry-over” the ten above the ten’s place column.

- Now add the ten’s place column (don’t forget to add any tens that were carried over).
- Finally add the hundred’s place column (don’t forget to add any hundreds that were carried over.)

Other **Addition** exercises: