# Lesson Video: Making Teen Numbers with Ten and Ones Mathematics • 1st Grade

In this video, we will learn how to decompose the numbers 11–19 into a ten and some ones.

05:05

### Video Transcript

Making Teen Numbers with Tens and Ones

In this video, we will learn how to decompose or break apart the numbers 11 to 19 into a ten and some ones. Here are the numbers 11 to 19: 11, 12, 13, 14, 15, 16, 17, 18, 19. We can make teen numbers from a ten and some ones. This is a ten frame. It’s full of counters. So, there are 10 counters. We can call this a ten. We can call these counters ones.

We have a ten and a one. 10 and one more is 11. We can decompose the number 11 or break it into two parts. 11 has a ten and a one. We can break number 12 into a ten and two ones. 10 and three ones makes 13, 14, 15, 16, 17, 18, 19.

Sophia used base ten blocks to make a number. How many ones are there? What is the number?

We know Sophia has used base ten blocks to make a number. She has one ten. How many ones are there? Let’s count. One, two, three, four, five, six, seven, eight. What is the number? We have one ten and eight ones. 10 and eight more is 18. Sophia’s number is number 18.

Decompose this number to complete the number bond.

We have to decompose or break apart this number to complete the part whole model. We know the number is number 16. 16 is 10 and some ones. We have to work out how many ones. Here’s our 10. Let’s add ones until we reach 16. 11, 12, 13, 14, 15, 16. We’ve added six ones. A ten and six ones makes 16. The missing number is number six. We broke apart the number 16 into a ten and six ones.

Look at how Sophia has made the number 13 from tens and ones. 13 is one ten and three ones. 13 is one ten and three ones.

What number does this table show?

The table is called a place value table. It shows the number of tens and ones in our number. Our number has a ten. Let’s count the ones. There are one, two, three, four, five, six. Our number has a ten and six ones. Let’s count forward six from number 10. 11, 12, 13, 14, 15, 16. A ten and six ones makes the number 16. The table shows the number 16.

What have we learned in this video? We’ve learned how to decompose or break apart the numbers 11 to 19 into a ten and some ones.

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