How many tens and hundreds

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How many tens and hundreds
I am learning how many hundreds there are in numbers over
1000.
$100
$100
$100
$100
=
$100
$100
$100
$100
$100
$100
$1000
We know how many $100 notes there are in $1000. There’s ten.
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$100
$1000
$1000
$1000
$1000
We can use this to work out how
many hundred dollar notes there
are in $2000. $2000 is twice as big
as $1000 so there must be twice as
many $100 notes (twenty $100
notes). Let’s check.
See the pattern? How many $100
notes must there be in $4000?
That’s right. There are forty $100
notes in $1000
A cricket club wants to buy some more bats. Each bat costs $100.
They have $3542 to spend. How many bats can they buy?
Step1: We need to find out how many hundred dollar notes there are
in $3542. First lets put $3542 in houses.
Thousands
Hundreds
Tens
Ones
3
5
4
2
Step 2: How many $100 notes are there in $3000?
30
Step 3: How many $100 notes are there in the hundreds
column?
5
Step 4: We don’t need to worry about the numbers in the
ones and tens column because they are less than $100
Step 5: Add up how many hundred dollar notes you found. 30 + 5 = 35.
This is how many bats they can buy.
A large business wants to buy some new desks. The desks cost
$100. They have $6304. How many desks can they buy?
Try doing this example in your head.
Step1: How many hundreds are there in $6000?
60
Step 2: How many $100 notes are there in the
hundreds column?
3
Step 3: Do we need to worry about the numbers in the ones
and tens column? No, they are less than $100.
Step 4: Add up how many hundred dollar notes you found.
60 + 3 = 63
Now try these questions on your own.
How many hundreds are there in the numbers below.
1) 8307
80 + 3 = 83
2) 2496
20 + 4 = 24
3) 5384
50 + 3 = 53
4) 2175
20 + 1 = 21
5) 7041
70 + 0 = 70
Click again when you have
completed each question and
the answer will be displayed.
Need some more practise? Try Pg47 of Teacher Tools Addition and
Subtraction Book Numeracy resources
Download
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