one billion
hundred million
ten million
one million
one hundred thousand
ten thousand
thousand
hundred
tens
ones
.
5
6
0
1
3
5
7
0
1
8
Decimal
(less than a dollar)
tenths
hundreths
thousandths
ten thousandths
hundred thousandths
millionths
9
2
2
0
5
3
5,601,357,018.922053
Five billion, six hundred one million, three hundred and fifty-seven thousand eighteen, and (DECIMAL point), nine hundred twentytwo fifty three millionths.
The last number in this number is in the millionths place. So when reading the decimal part of the number you would always say
the last place value; tenths, hundreths etc... whichever place it is.
If you are going to continue in math you might need to know what expanded notation means.
What does a number like this 532 really mean?
It means 500 + 30 + 2
Before we had place value we would write numbers in expanded notation. Big numbers were written like this
5000 7000
12000
400 +
0=
400
100
90
60
50
2
5
7
That is in expanded notation instead of using place value which would be
5, 492 + 7,065 = 12,557
It's much easier and shorter to use place value instead of expanded notation!
A little practice ...
Write these numbers in expanded notation.
1.
323
2.
56, 708
3.
4,098,032,529
4.
650
5.
909,929
6.
3,001
7.
87,005
8. 870
9. 584,004,007