Related Subtraction Equations

Imagine that you have 5 cookies.

You eat 3 cookies. How many are left?

That's right! šŖ There are 2 left.

The subtraction problem would look like this:

5 - 3 = 2

Do you remember what we call each part of a subtraction equation?

Let's look at a different problem using the 5 cookies.

This time, you eat 2 cookies.

There would be 3 cookies left over.

Here is the subtraction equation for this problem:

5 - 2 = 3

These equations (**5 - 2 = 3 **and **5 - 3 = 2****)** are part of a **fact family**.

They have the same numbers but are arranged differently.

š They are also called **related equations.**

To find related equations in subtraction, swap the position of the **difference **with the **subtrahend.**

Why are these equations **related**?

šBecause the **2 **and the **3 **are **parts **of the **total,** 5.

When you take **one part away **from the **total,** you get the **other part!**

So what's the related subtraction equation to **5 - 3 = 2?**

Yes, it's **5 - 2 = 3**.

Let's look at another example!

We have this equation:

7 - 3 = 4

What related subtraction equation can you create?

Don't forget to swap the **subtrahend** and the **difference**!

7 - 4 = 3

You've got it!

You now know how to find related equations in subtraction. Start your practice below. š

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