Regrouping Tens and Ones

In the Beginning Double-Digit Addition lesson we learned how to add **two-digit **numbers like 11 and 18.

👉 **First **add up the **Ones,** and then the **Tens **digits.

Start by writing the equation in **column form. **Line up the Ones digits on the right (👉).

Now add the **Ones digits.**

Then move on to the **Tens** place value digits:

So 11 + 18 = 29.

Can you do that in your head? 🤓Try it.

Now something** cool** happens when we add even **bigger** numbers. Let's take a look.

Start by writing the equation in **column form:**

What's 8 + 3? 11. But you can't write two digits in the Ones place.

Each column can only have **one digit**!

That's when you **regroup.**

When one column adds up to more than 10, you **regroup** 10 Ones into 1 Tens.

This is also called **"carrying the 1 over":**

After we carry the 1, we add all of the **Tens** place digits.

13 + 18 = 31 🎉

Congratulations, you've learned how to **regroup 10 Ones into 1 Tens.** Now try the practice to get really good at regrouping.

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