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Math 50

6.1 – Decimals and Rational Numbers

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Decimal notation is just a different way to write fractions.

ex: (read: “four and ninety-one hundredths”)

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3 9 4 1 . 5 0 7 8 2

Thousands

Hundreds

Tens

Ones

Tenths

Hundredths

Thousandths

Ten thousandths

HundredThousandths

Decimals have fractional place values (the “-ths”). Here are the place values of 3941.50782:

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3941.50782 is read:“three thousand nine hundred forty oneandfifty thousand seven hundred eighty two hundred thousandths”

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Ex 1.Write the word name. three hundred forty one hundred thousandths eighty two and three thousand ninety two ten thousandths

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Ex 1.Write the word name. three hundred forty one millionths eighty two and three thousand ninety two ten thousandths

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Ex 1.Write the word name. three hundred forty one millionths eighty two and three thousand ninety two hundred thousandths

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Ex 2.Write as a fraction or mixed number in lowest terms.

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Ex 3.Graph on a number line.

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Ex 4.Use to write a true statement.

Comparing

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Ex 4.Use to write a true statement.

Comparing

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Ex 4.Use to write a true statement.

Comparing

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Ex 4.Use to write a true statement.

Comparing

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Ex 4.Use to write a true statement.

Comparing

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Ex 5.Round to the specified place. Tenths Hundredths

Thousandths Ten-thousandths

Rounding

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Ex 5.Round to the specified place. Tenths Hundredths

Thousandths Ten-thousandths

Rounding

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Ex 5.Round to the specified place. Tenths Hundredths

Thousandths Ten-thousandths

Rounding

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Ex 5.Round to the specified place. Tenths Hundredths

Thousandths Ten-thousandths

Rounding

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Ex 5.Round to the specified place. Tenths Hundredths

Thousandths Ten-thousandths

Rounding