# Place Value Lesson - 1st and 2nd Grade Math

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Hey kids what's up?
Today we are learning about place value.
Let's go and look at the example.
So we can start learning.
Come on guys let's go.
Here we have what I like to think of as a place value house.
This is the home of the place values.
Over here we have big brother hundreds,
and in this room we have sister tens,
and in last room we have baby ones.
Now, in a place value house we have a rule
that says we can have only one digit
in each room.
Remember that a digit is any number from 0 to 9.
In this house we can have only one number or digit
in each room.
That is the rule and we have to follow it.
So, let's look at this number and put it in the right place.
Here we have number the 50.
The number 50 has 2 digits in it.
The 0 is a digit and the 5 is a digit.
So, they need to be in separate rooms in the house.
So let's think about how many tens are in 50.
We have 5 tens that make up 50.
Now how many do we have in the ones place?
We have 0.
So we have 0 ones in the ones place.
Let's look at the number 50 using our place value blocks.
We know that to get 50 we need 5 tens,
1,
2,
3,
4,
5
and 0 ones.
Each one of these tens blocks is made up of 10 ones
If I counted every individual block
in these tens blocks,
we would see there are 50 of them.
Now, what if we move the number 5 over here in the hundreds place.
We cannot leave this middle room empty
So we are going to fill with the number 0.
Looking at this number we no longer have 50 like we did before.
Is this number a lot different than 50?
With the 5 moving places
we now have 500.
To show us this let's get some hundreds blocks.
To get 500 we need how many hundreds blocks?
If you said 5 you are correct.
We need 1 hundred,
2 hundred,
3 hundred,
4 hundred,
5 hundred.
If we compare 500 to 50
we can easily see that 500 is a lot more than 50.
So a 5 in the hundreds part
is a lot bigger than a 5 in the tens part.
It's very important to pay attention
to which part the numbers are in
because this changes the value of a number.
Let's look at another one.
This is the number 6
and it is in the ones room.
If we represent this number with blocks
we would have 6 ones blocks.
So we have 6 in the ones place.
But what if we move the 6 to the tens place,
does that change anything?
We can see the difference between the
6 in the ones place and the 6 in the tens place
by using the blocks.
Here we have the 6 ones
and here we have the 6 tens blocks.
As we can see there is a big difference
between the 6 in the ones and the 6 in the tens.
The 6 in the tens place has a value of 60.
And the 6 in the ones place has a value of 6.
Remember that we need to pay attention
to what place the numbers are in.
Now, let's move the 6
over to the hundreds part
and see if this has a different value.
So can you tell me what number this is?
The number is 600.
Great job guys!
We have the 6 in the tens place
which gave us 60
but now it is in the hundreds place
which gives us 600.
Is 600 worth more than 60?
It is worth more than 60.
Our blocks can show us this.
Each of these hundreds blocks represent
one hundred of the ones blocks
and ten of the tens blocks.
Having a 6 in the hundreds place
is definitely a lot bigger than a 6
in the tens place.
We have time for just one more number to look at.
In this one we have 2 digits.
This is the number 27.
To look at this number with the blocks
we would have how many tens blocks?
2 tens blocks.
Correct!
How many ones blocks?
We have 7 ones blocks.
Good job!
We have 2 in tens place
and 7 in the ones place
which gives us 27.
But what if we move these numbers
over to the next room.
Let's do that and see what we have.
We no longer have 27.
What number is this?
We have the number 270.
Is the value of 270 bigger than 27?
Yes it is a lot bigger
and we can see that with the blocks.
To get the 2 in the hundreds place
we need 2 hundreds blocks
and to get the 7 in the tens place
we need 7 tens blocks.
And we have 0 in the ones place.
So remember that when the numbers are in
different places they have different values.
And knowing this will help you understand
the difference between large and small numbers.
Thanks for watching guys.
We will see you next time.