1. Warm Up
In the book on page 118 #5-8

2. Lesson 3.1 Decimals and Place Value
Goal: The learner will identify place value in decimal numbers.

3. What’s a decimal and how is it different from a digit?
A digit is any of the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
A decimal is a number in which each place value is ten times the place value to its right.
How many ones does it take to make a ten?
How many tens does it take to make a hundred?

4. Decimals and Place Value
Millions
Hundred thousands
Ten thousands
Thousands
Hundreds
Tens
Ones
Tenths
Hundredths
Thousandths
Ten-thousandths
Hundred-thousandths
millionths 3. 1 2
Word Form: three and twelve hundredths
Decimal Form: 3.12
Expanded Form: 3 ones + 1 tenth + 2 hundredths

5. Write in word form.
The word and tells where the decimal point is.
Write two hundred seventy-eight ten-thousandths in decimal form.

6. Example: A person timing your swim meet says your time was twenty-eight and six tenths seconds. Write you time as a decimal.
Buddy Rice won the 2004 Indianapolis His best leading lap time was seconds. Write his time in words.

7. You Try It!
Write twenty-five and seven hundred-thousandths as a decimal.
Write in words.
Animated Math

8. Explain how to write a number written in words as a decimal
Explain how to write a number written in words as a decimal. Use an example to illustrate your explanation.
P.121 #9, 11, 13, 15, 21, 24, 33, 35, 39