Whole Numbers

Whole Numbers

• Whole Numbers are simply the numbers 0, 1, 2, 3, 4, 5, … (and so on) 

 

No fraction!

Counting Numbers

• Counting Numbers are Whole Numbers, but without the zero. Because you can't "count" zero. So they are 1, 2, 3, 4, 5, … (and so on).

Natural Numbers

• Mean either "Counting Numbers" {1, 2, 3, ...}, or "Whole Numbers" {0, 1, 2, 3, ...}, depending on the subject.

Place Value till Ten Thousands

• The position, or place, of a digit in a number written in standard form determines the actual value the digit represents. 
• Below shows the place value for various positions:

Place (underlined)           Name of Position
1 000                                 Ones (units) position
1 000                                 Tens
1 000                                 Hundreds
1 000                                 Thousands
10 000                               Ten Thousands
1 000 000                          Hundred Thousands
1 000 000                          Millions

Place Value

Example
The number 21,040:

• Has a 2 in the ten thousands place,
• a one in the thousands place, 
• a 4 in the tens place, 
• and a 0 in both the hundreds and ones place.
• Can be written as twenty-one thousand and forty.