Place Value

If we want to make numbers bigger than 9 we have to put more than one digit together.

Where each digit goes depends on its place in that number.

The 4, 3 and 7 above do not make a number but the 4, 3 and 7 below make the number four hundred and thirty-seven, 437

How do we know where each digit goes?

When we count from 1 to 9, each number is a unit.

To show the number 1 we place 1 in the units column.

We have 1 block or 1 unit so we write the digit 1 in the units column

 

 

In this example we have 7 blocks or 7 units

so we write the digit 7 in the units column

 

Once we have ten units we make a block of ten so we have 1 ten but no units

Here we have 1 block of ten units placed in the tens column and no units.

We write this by putting the digit 1 in the tens column and the digit 0 in the units column.

 

In this example we have 3 blocks of ten or 3 tens and 2 single blocks or 2 units

so we write the digit 3 in the tens column and the digit 2 in the units column

 

Once we have ten blocks of ten we make a block of a hundred so we have 1 hundred but no tens and no units

Here we have 1 block of one hundred units or ten tens placed in the hundreds column with no tens and no units.

We write this by putting the digit 1 in the hundreds column, the digit 0 in the tens column and the digit 0 in the units column.

 

In this example we have 1 block of a hundred, 2 blocks of ten and 3 single blocks or units

so we write the digit 1 in the hundreds column, the digit 2 in the tens column and the digit 3 in the units column

 

Maths Topics

Place Value    Adding    Number Bonds    Mental Addition    Adding by Chunking    Column Addition    Subtracting    Subtracting by Chunking    Column Subtraction    Mental Subtraction    Roman Numerals

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Page last updated 02/04/2016