How to Add 1-Digit to 2-Digit Numbers

Numbers are made up of digits. 

The numbers between 0 and 9 have only one digit.

Bigger numbers have two or more digits:

10, 23, 99

Tip: The right (👉) digit is called the Ones digit.

So, how do we add a one-digit number to a two-digit number?

Let's learn with an example.

3 + 23 = ?

1️⃣ First, we write the numbers in column form, like this:

Tip: Put the Ones place digits in the Ones column on the right (👉). 

      Next, add one column at a time, starting with the Ones column.

3 + 3 = 6. We write the answer below the answer bar.

Then, add the Tens place:

The blank space above the 2 means there are 0 Tens.

We write 2 in the answer area.

So, we did it! 

23 + 3 = 26! 🍰

Let's Review

To add a 1-digit to a 2-digit number:

1. Write the numbers in column form. 

Remember: Write the Ones place on the right (👉).

2. Add the Ones place first.

3. Then add the Tens place.

Great job! 😺

Now, you're ready for the practice.