**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 00

__0__Ones (units) position

1 0

__0__0 Tens

1

__0__00 Hundreds

__1__000 Thousands

__1__0 000 Ten Thousands

1

__0__00 000 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.

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