Decimal Notation

# Decimal Notation - Decimal Notation I Naming a Decimal...

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Decimal Notation I. Naming a Decimal Among all fractions there is a collection of special fractions called decimal fractions . Decimal fractions are fractions where the denominator is a power of ten. For example 3 78 91 142 , , , 10 100 10,000 1,000 There is an alternative way to write a decimal fraction. We can write 3 78 91 = 0.3, = 0.78, = 0.0091 10 100 10,000 Notice that the the decimal place is moved to the left the same number of digits as number of zeros in the denominator. To read decimal numbers remember that from left to right the digits to the right of the decimal point are: Tenths, Hundredths, Thousandths, Ten-Thousandths, etc. Examples 0.23 = twenty-three hundredths 5.2 = five and two tenths We use the word "and" to separate the whole number and decimal 34.00021 = thirty-four and twenty-one hundred-thousandths Exercises Write down the word for A. 0.542 B. 4.02 Write down the decimal for C. three thousandths

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