L 7: Reading and Writing

Decimal NumbersAt the end of this lesson you will be able to:

•Understand the value of a decimal by placing it on a number line.•Understand the relationship a decimal number has to a whole number.•Understand the connection of working with decimals related to careers that involve money management.•Understand, interpret, and work with concrete objects and symbolic representations (e.g. pictures, numbers, graphs, computer representations).

Decimal Place Value

tens ones

.tenths hundr

edthsthousandths

10 10.1 0.0

10.001

Fill in Place Value Chart

Rule: Reading a Decimal Number less than one

Read the number. Say the place value with a “th” at the end.

0.6 = six tenths 0.28 = twenty eight hundredths 0. 116 = one hundred sixteen

thousandths

Rule: Reading a Decimal Number greater than one

Read the whole number to the left of the decimal point and “say” and for the decimal point and follow the steps for reading a decimal number less than one.

1.36 = one and thirty-six hundredths

Write out what you would say if you were reading the number out

loud.

0.408• Four hundred eight thousandths

0.309• Three hundred nine thousandths

56.432• Fifty six and four hundred thirty two thousandths

408.0408• Four hundred eight and four hundred eight ten

thousandths 1,690.8319

• 1 thousand six hundred ninety and eight thousand three hundred nineteen ten thousandths

Write down the following monetary values in number form.

Forty-six dollars and five cents• $46.05

Ninety dollars and ten cents• $90.10

One hundred ten dollars and fifty cents• $110.50

Fourteen dollars and seventy five cents• $14.75

Fifty dollars and six cents• $50.06