How to explain 10s And Units
Place Value First Grade - Tens and Ones
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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
