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Dizzying Decimals
What is a decimal?
A decimal is a fractional number and is indicated by digits after a period
which is called a decimal point.
Place Values of Decimals
Decimal numbers, such as O.6495, have four digits
after the decimal point. Each digit is
a different place value.
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.
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.
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.
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".
Ten-Thousandths
•Ten thousandths have four digits after the decimal point.
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".
So we’ve looked at:
• .0025
• Twenty-five ten- thousandths
•Standard Form
•Word Form
What all will we do with decimals?
LOTS!!•Read•Write•Compare•Order•Round•Add•Subtract
• Multiply• Divide• Word Problems• Change into
fractions• Change into
percents• Use with money
problems.
WOO HOO!!
Let’s get started!!