Dizzying Decimals

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Dizzying Decimals
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What is a decimal?
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• A decimal is a fractional number and is indicated
  by digits after a period which is called a
  decimal point.

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Place Values of Decimals

• Decimal numbers, such as O.6495, have four digits
  after the decimal point.  Each digit is a
  different place value.  

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Okay

• The first digit after the decimal point is called
  the tenths place value. There are six tenths in
  the number O.6495.
• The second digit tells you how many hundredths
  there are in the number.  The number O.6495 has
  four hundredths. 
• The third digit is the thousandths place. 
• The fourth digit is the ten thousandths place
  which is five.
• Therefore, there are six tenths, four hundredths,
  nine thousandths, and five ten thousandths in the
  number 0.6495.

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Tenths

• Tenths have one digit after the decimal point
• The decimal 0.8 is pronounced "eight tenths" or
  "zero point eight"
• It is equal to the fraction 8/10.

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Hundredths

• Hundredths have two digits after the decimal
  point.
• The decimal 0.36 is pronounced "thirty-six
  hundredths" or "zero point thirty-six".
• It is equal to the fraction 36/100.

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Thousandths

• Thousandths follow a similar pattern.
• They have three digits after the decimal point.
• The decimal 0.749 is pronounced "seven hundred
  forty-nine thousandths" or "zero point seven four
  nine".

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Ten-Thousandths

• Ten thousandths have four digits after the
  decimal point.

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Zeros in the Decimal

• There may be zeros after the decimal point.
• The decimal 0.064 is pronounced "sixty-four
  thousandths" or "zero point zero six four".

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So weve looked at

• .0025
• Twenty-five ten- thousandths

• Standard Form
• Word Form

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What all will we do with decimals?
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LOTS!!

• Read
• Write
• Compare
• Order
• Round
• Add
• Subtract

• Multiply
• Divide
• Word Problems
• Change into fractions
• Change into percents
• Use with money problems.

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WOO HOO!!

• Lets get started!!