3 Digit Addition

3-digit addition is the process of adding numbers that have three digits, such as 123 + 456.

In the number 256, the digit 5 is in the tens place, which means it represents 50.

To add numbers in the hundreds place, you align the numbers vertically and add the digits in the hundreds column, carrying over if necessary.

Carrying is when the sum of a column exceeds 9, and you move the extra value to the next left column.

The sum of 123 and 456 is 579.

If the sum of the ones place is more than 9, you carry over to the tens place.

The first step is to line up the numbers by their place values: hundreds, tens, and ones.

The sum of 789 and 213 is 1002.

In the number 742, the digit 2 is in the tens place, which means it represents 20.

You can check your answer by adding the numbers again or by using subtraction.