decimal
example
place value
Large and Small
So, our Decimal System lets us write numbers as large or as small as we want, using the decimal point. Digits can be placed to the left or right of a decimal point, to show values greater than one or less than one.
The decimal point is the most important part of a Decimal Number. Without it we are lost, and don't know what each position means.
The decimal point is the most important part of a Decimal Number. Without it we are lost, and don't know what each position means.
17.591
On the left of the decimal point is a
whole number (such as 17)
As we move further left,
every place gets 10 times bigger.
The first digit on the right means
tenths (1/10).
As we move further right,
every place gets 10 times smaller
(one tenth as big).
whole number (such as 17)
As we move further left,
every place gets 10 times bigger.
The first digit on the right means
tenths (1/10).
As we move further right,
every place gets 10 times smaller
(one tenth as big).
As we move left, each position is 10 times bigger!
Example: Hundreds are 10 times bigger than Tens
... and ...
As we move right, each position is 10 times smaller.
From Hundreds, to Tens, to Units
Example: Hundreds are 10 times bigger than Tens
... and ...
As we move right, each position is 10 times smaller.
From Hundreds, to Tens, to Units
Ways to think about Decimal Numbers
... as a Whole Number Plus Tenths, Hundredths, etc
You could think of a decimal number as a whole number plus tenths, hundredths, etc:
You could think of a decimal number as a whole number plus tenths, hundredths, etc:
... as a Decimal Fraction
Or, you could think of a decimal number as a Decimal Fraction.
Or, you could think of a decimal number as a Decimal Fraction.
... as a Whole Number and Decimal Fraction
Or, you could think of a decimal number as a Whole Number plus a Decimal Fraction.
Or, you could think of a decimal number as a Whole Number plus a Decimal Fraction.
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