Numbers

We use ten digits in our normal number system. These are 0 1 2 3 4 5 6 7 8 9. From these 10 numbers we can make every other number. These range from the very small 0.01 to the very large 2,345,567

Each one of these numbers is called a digit so a two digit number is 25 or 52

A three digit number could be 451 or 145

You will notice that we are using the same digits but the number are different.  This is because the position of the digit is very important. The value of digit depends upon its position.

200 is ten times bigger than 20 which is ten times bigger than 2

so 200 is (ten times ten) a hundred times bigger than 2

This is easy to see below

 Hundreds Tens Units 4 5 1 1 4 5

Here we have in the first row 4 hundreds 5 tens and 1 unit, this is larger than the second row when we have only  1 hundred 4 tens and 5 units

Many of these numbers are easy to say but bigger numbers can cause confusion

451 is written as four hundred and fifty one

1,451 is one thousand four hundred and fifty one

21,451 is twenty one thousand four hundred and fifty one

We treat the thousands the same way that we treat every other number as either a unit a ten or a hundred

 Hundreds Tens Units Hundreds Tens Units Thousands 1, 4 5 1 2 1 4 5 1 4 2 1 4 5 1

So the last number is four hundred and twenty one thousand four hundred and fifty one.

See its easy when you know how!

How about REALLY BIG numbers MILLIONS

They are just the same, they are either units, tens or hundreds

1,000,000 is 1 million (one)

21,000,000 is 21 million (Twenty one)

421,000,000 is 421 million (four hundred and twenty one)

You see this Hundreds Tens and Units stuff is really useful!

Fill in the following gaps. Some have been done for you.

 H T U H T U Words 3 4 5 Three hundred and forty five 2 5 6 4 6 8 9 Four thousand six hundred and eighty nine 2 3 0 2 1 3 4 5 7 1 4 5 6 2 3 8 6 7 1 0 3 4 Sixty nine thousand four hundred and forty three Two thousand and twenty six

 Hundreds Tens units Hundreds Tens units Words 3 4 5 Three hundred and forty five 2 5 6 Two hundred and fifty six 4 6 8 9 Four thousand six hundred and eighty nine 2 3 0 2 Twenty three thousand and two 1 3 4 5 7 1 One hundred and thirty four thousand five hundred and seventy one 4 5 6 2 3 8 Four hundred and fifty six thousand two hundred and thirty eight 6 7 1 0 3 4 6 hundred and seventy one thousand and thirty four 6 9 4 4 3 Sixty nine thousand four hundred and forty three 2 0 2 6 Two thousand and twenty six

Well how did you do?

Remember when you are writing numbers with lots of digits always start counting in from the right, after three digits put in the comma. 2,541and this will show you where the thousands start. Two thousand five hundred and forty one

If you can count another three digits you are into the millions 4,562,541
Four million five hundred and sixty two thousand five hundred and forty one
Note thousands after the first comma and the millions after the second.

Well that wasn't too hard, just to finish off

Give the value of the digit in bold. I have done the first one for you.

 645 Forty 21,345 578,532 3,453,456 42,564 200,201

That's it

 645 Forty 21,345 One thousand 578,532 two 3,453,456 Three million 42,564 Forty thousand 200,201 Two hundred

Congratulations and don't worry about numbers they can be great fun.