PLACE VALUEThe value of a number based on

its position

Value = what is a number worth

3,459OnesTensHundredsThousands

Value = what is a number worth

3,000 + 400 + 50 + 93,459

The DecimalSeparates the wholes from

the fractions

45.75PartWhole

The Right of the Decimal

3.567Tenths Hundredths Thousandths

510

6100

71000

Four Different Ways to Write it!

Standard Form

Expanded Form

Expanded Form with Exponents

Word Form

Standard Form

2,403,354,240Period-every three digits from right

to left

Expanded Form

2,000,000,000 + 400,000,000 + 3,000,000 + 300,000 + 50,000 +

4,000 + 200 + 40

Expanded Form withExponents

(2X10) + (4X10) + (3X10) + (3X10) +

(5X10) + (4x10) + (2X10) + (4X10)

9 568

234

Tells the number of zeros when multiplying by

powers of 10

Word Form

two billion, four hundred three million, three hundred fifty-four

thousand, two hundred forty

Each period gets a comma when you write it out

Use a hyphen between two digit words