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CCSS.MATH.CONTENT.2.NBT.B.7

## 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.

## Adding Numbers in Expanded Form

How is expanded form used in addition? 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. When using expanded form addition with tens and ones, follow these steps:

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

## Addition Using Expanded Form – Examples

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

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

Using expanded form in addition, we can say we will have seventy-eight screws all together.

Let’s take a look at one more example. Jake 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?

Jake will have ninety-eight seeds for his salad!

Remember when adding using expanded form, you need to follow these steps:

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

Step # What to do
1 Start by writing your numbers in expanded form