Add Two Three-digit Numbers

To add two numbers, first align the numbers so that place values are lined up and then start adding from the right most place value.

For example: Let's find the sum of 125 and 211.

First, add the ones.

	1	2	5
+	2	1	1

6

Now, add the tens.

	1	2	5
+	2	1	1

3

6

 Add the hundreds.

	1	2	5
+	2	1	1

3

3

6

The sum of 125 and 211 is 336.