Column addition is a way of adding numbers together. It's helpful when you're adding two-digit or three-digit numbers together. When you do column addition, you lay out the numbers you are adding ...

When adding mixed numbers, you can use a similar method to adding two fractions, but this time you have to add whole numbers as well. Remember, a mixed number is a combination of an integer (a whole ...

You can sum up entire columns or rows in Microsoft Excel using the AutoSum feature. The AutoSum tool automatically selects a column or row of numbers, but you can select any set of numbers by clicking ...