hello kids and welcome to the place

value house today we are talking about

ones and tens I have here at place value

house that has spots for ones tens and

hundreds we will only be talking about

the ones and tens today here we have the

tens and ones places there are rules in

this house that have to be followed and

one of the rules is that you can only

have one digit in each room a digit is

any number from 0 to 9 let me show you

what I mean

here is the number two and this is one

digit because there is just one number

let's look at another number

this is the number 20 can you tell me if

this number has more than one digit

yes the number 20 has two digits because

the two is a digit and the zero is a

digit

uh-oh we cannot put both numbers in the

one's room we have to split them into

each place

this is still the number 20 we just have

the two in the tens place and the zero

in the ones place

now that we have that rule out of the

way let's look at some place value

blocks

here is a ones block this one's block is

worth one and is represented by the

number one

what if I add more ones blocks to the

ones place

how many ones blocks do I have now

I have five ones blocks great job we can

see the number five above the room and

we are not breaking the house rules

because we still have just one digit in

the room

now let's add four more ones blocks

how many blocks do we have now can you

count them for me we have nine of the

ones blocks great job again

but wait a minute another block just

moved into the ones place but something

is wrong

I think I know what it is we have

reached the number 10 because we have

reached the number 10 we have more than

one digit and we are breaking the rule

of one digit per room now here is the

really cool part that I learned the

other day watch what happens to the

blocks when there are 10 of them in the

ones place

all of the ten ones blocks stuck

together to form what we call a tens

block this is a group of ten ones called

a ten why do you think we call this a

ten

we call it a 10 because this tens block

is made up of ten ones blocks you guys

are awesome when we had nine of the ones

blocks in the room we had no problems

but once we reach ten we had to form a

tens block

the tens block is now in the tens place

and not the ones place in the tens place

we are only allowed to have groups of

ten that means we cannot have any ones

blocks in this room if we look at the

number above we see a number one in the

tens place and the number zero in the

ones place

we have to remember that the 10 in the

tens place is really 10 ones blocks that

have grouped themselves together to form

a 10

this is some amazing stuff to learn

let's look at another one

here we have four ones blocks and they

go in the ones place

now count with me as we add more ones

blocks to the room 5 6 7 8 9 and here

comes one more once we have 10 of the

ones blocks we have to group them into

what

we group them into a ten great job

this is a TENS block can you tell me

which room a TENS block belongs in

it belongs in the tens room you guys are

amazing at this we now know that when we

have ten ones blocks it is grouped into

a ten the number ten means one ten and

zero ones because there is nothing in

the ones room Wow

this has been amazing thank you so much

for helping me come visit me again

real soon good bye