Hello, my name is Kiley, and welcome to Place Value 1 - Ones and Tens.
Did you know that each number is made up of digits that hold a special value within a number?
It's true!
A digit is one of the ten single numbers 0, 1, 2, and so on until 9.
In this video you'll learn what each digit in a number is worth just by where it's placed in the number.
We'll look at the ones and tens place.
Ready to learn more?
To understand place value, we need to look at our number system, known as a,
"Base Ten System," or, "The Pattern of Tens."
When we count, we count different objects or units, one at a time like this.
1,
2,
3,
4,
5,
and so on.
If we have many units like this,
we can make counting them easier if we group them in as many sets of 10 as we can, like this.
This set of ten is the same as 10 units,
or 10 units makes 1 ten.
Here we have 5 more units.
Doesn't this make it easier to count the number of blocks, now that they're grouped this way?
You can easily see there are 10, 11, 12, 13, 14, 15 blocks,
or simply 10 plus 5 more, which is 15.
By the way, these blocks have a special name.
They are called, "Base Ten Blocks,"
and they are used to represent number patterns.
Now let's look at how this number pattern of base ten can be used on a place value chart.
This is a place value chart.
Do you notice the different columns with different headings?
When looking at place value, we work from the right side to the left side.
On the right we have the ones place, and on the left you see the tens place.
If we place the number 24 on the place value chart,
we see that 24 is actually made up of 2 groups of ten and 4 ones,
or 2 tens and 4 ones.
Let's try one more number.
How would we represent 37 on this chart using base ten blocks?
Well, 37 means there are 37 units,
but 37 units grouped into a pattern of ten
means there are 3 groups of ten plus 7 individual units, like this.
30 + 7 = 37
Finally, what is this number represented on the place value chart?
We can count each block,
or if we use the pattern of tens, and group these ones into tens,
we see we have 2 tens, or 20.
So 20 plus 0 ones equals...
20!
You got it.
You have now learned the basics of place value up to the tens place.
Be sure to watch the next video to learn about the hundreds and thousands place.
Wow!
In the meantime, keep practicing place value on our fun online games and quizzes.
And remember to always be clever.