### Video Transcript

Tens

In this video, we will learn how to
model a 10 as 10 ones and to model multiples of 10 using base 10 blocks. Here are some base 10 blocks. This tower is called a 10, and this
is called a ones block. We can use base 10 blocks to help
model numbers. We can use these 10s to help us
model multiples of 10. There are three 10 blocks. Let’s count in 10s to find out what
the number is. 10, 20, 30. 30 was made using three 10s. Let’s practice modeling numbers
using base 10 blocks.

How many ones make a 10?

Let’s count. There’s one, two, three, four,
five, six, seven, eight, nine, 10. 10 ones make a 10.

A number has been made from place
value blocks. How many groups of 10 are
there? What is the number?

In the first part of the question,
we need to count the number of 10s there are in the model. Let’s count. One, two, three, four, five, six,
seven. There are seven groups of 10.

What is the number? To find the number, we need to work
out what seven 10s are. We could count forward in 10s seven
times. Let’s count. 10, 20, 30, 40, 50, 60, 70. Seven 10s are 70. There are seven groups of 10, which
makes 70.

What number is missing? 90 marshmallows equals what groups
of 10?

In this question, we’re being asked
how many 10s there are in 90. If there are 90 marshmallows, how
many groups of 10 can we make? We could make the number 90 using
place value blocks. 10, 20, 30, 40, 50, 60, 70, 80,
90. How many groups of 10 are
there? One, two, three, four, five, six,
seven, eight, nine. 90 marshmallows equals nine groups
of 10. The missing number is number
nine. We counted in 10s until we reached
90. Nine 10s made 90. The missing number is nine.

What have we learned in this
video? We’ve learned that 10 ones make a
10 and how to model multiples of 10 using place value blocks.