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Mr. Squeaks and Imani are having a racing contest to see who can go faster around the track. Mr. Squeaks is adding his speeds together to see how fast he can go, but he needs a strategy— addition using column addition! Learn more below all about column addition.

Expanded Form – Definition

Expanded form is when you write a number to show the value for each digit. For example, the number twenty-two can be written in expanded form as twenty and two.

What is column addition? How is it used? There are many different strategies and tools to use to solve addition equations. One of those is using expanded form, when you write a number to show the value for each digit and column addition.

When using expanded form addition with tens and ones, follow the steps below:

Step # What to do
1 Start by writing your numbers in expanded form
4 Finally, add the tens and ones together one last time

You may be wondering how to do addition using column addition… start by taking a look at the examples below and try to solve them using expanded form and column addition to add.

Mr. Squeaks and Imani are adding items together for a new project that they are building. If they have thirty-two small screws and forty-six big screws, how many screws do they have all together?

Mr. Squeaks and Imani will have seventy-eight screws all together.

Let’s take a look at one more example. Mr. Squeaks is adding together different ingredients for a salad that he is making. If he wants to add fifty-one sunflower seeds and forty-seven lemon seeds, how many seeds will he have all together?

Mr. Squeaks will have ninety-eight seeds for his salad!

Step # What to do
1 Start by writing your numbers in expanded form
4 Finally, add the tens and ones together one last time

• Finally, add the tens and ones together one last time