Decimal Place Value

Decimal Place Value

Place Value

• It is going to be very important for you to know and understand the decimal place value.

• Today you will practice writing decimals in word form and taking decimals written in word form and writing them in number form.

How to Write Decimals in Word Form

You have to use the number in the farthest right place to name you decimal.

For example 0.65 -The five is the farthest right place and it is in the hundredths place so you would write this as Sixty Five hundredths.

The same would go for 0.08 - The eight is the farthest right number and it is in the hundredths place so you would label it eight hundredths.

Multiple Choice

What is 0.86 in word form?

• Eighty six thousandths

• Eighty Six hundredths

• Eighty Six

• Eighty Six tenths

Open Ended

Write 0.654 in word form.

Open Ended

Write 0.07 in word form.

Open Ended

Write 0.009 in word form.

Decimals with Whole Numbers

• You can also write decimals that have whole numbers. You use the word AND in place of the decimal.

• For example 543.88 would be written as five hundred fourty three and eighty eight hundredths.

Open Ended

Write 43.22 in word form

Open Ended

Write 437.771 in word form.

From word form to decimal form

• Be sure to pay close attention to the "th" in the words. This will tell you if it is part of the decimal or the whole number. Hundred would be in the whole number, but hundredth would be part of the decimal.

• For example, fifty seven and three hundred fourty seven thousandths would be written as 57.347.

• Use the and to tell you where to place the decimal.

Open Ended

Write three hundred fifty two and seven tenths in number form.

Open Ended

Write three hundred fifty two and seven thousandths in number form. (Yes, it is different from the last slide).

Open Ended

Write six hundred forty nine thousand one hundred twenty five and forty three thousandths in word form.