If the two numbers in a place value column add up to ten or more, you must regroup. This means breaking a number up into tens and ones, or hundreds and tens to help with the addition.

When adding larger numbers together you can use column addition. First you line the numbers up in the correct ones and tens columns. Then start by adding the ones. If the ones add up to a total of ...

How to use AutoSum in Excel AutoSum works best when you have a column or row of numbers you want to add up. 1. Click the empty cell underneath the column of numbers that you want to add up.