1. PLACE VALUE WITH DECIMALS Unit 9

2. How do I know what kind of decimal it is? The name of a decimal is determined by the number of places to the right of the decimal point Number of PlacesDecimal NameExample 1tenths0.7 2hundredths0.05 3thousandths0.016

3. 3. Thousand H undreds tens Ones. tenths Hundredths Thousands What place is the 5 in ? 0. 005

4. What are mixed decimals? Mixed decimals are numbers with both whole numbers and decimals. Exp:  123.45

5. How do you read decimals? To read a decimal correctly, first find the decimal point Whole numbers are to the left of the decimal point; any numbers to the right of a decimal point form a decimal fraction Say “and” for the decimal point TThe decimal 2164.511 is read as “two thousand, one hundred sixty-four and five hundred eleven thousandths”

6. 6. Thousand H undreds tens Ones. tenths Hundredths Thousands What place is the 2 in ? 0. 2

7. 7. Thousand H undreds tens Ones. tenths Hundredths Thousands What place is the 4 in ? 0. 04

8. 8. Thousand H undreds tens Ones. tenths Hundredths Thousands What place is the 5 in ? 123.56

9. 9. Thousand H undreds tens Ones. tenths Hundredths Thousands What place is the 6 in ? 123.56

10. Zeros after the decimal point Writing extra zeros after the decimal point does not change the value! TThe decimals 0.2, 0.20, and 0.200 are equivalent decimals

11. HERE ARE SOME PRACTICE PROBLEMS IN WHICH I WILL WORK THROUGH WITH YOU TO MAKE SURE THAT YOU UNDERSTAND THE MAIN CONCEPTS COVERED. Practice

12. Exercise 1 Write the decimals. 1. Five thousandths 2. Ninety-four thousandths 3. Three hundred thirty-six and sixty-nine hundredths

13. Exercise 2 Write each decimal in words. 1. 7884.011 2. 5592.4 3. 4.203 4. 612.250 5. 10.44

14. Exercise 3 In what place (on the place value chart) is the underlined digit? Write the answer. 1. 1.475 2. 3.763 3. 7780.215 4. 412.407 5. 902.103

15. Exercise 4 Write a decimal that has the same number. 1. 0.2 2. 5.51 3. 410.6 4. 753.809

16. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com Is home to over a thousand powerpoints submitted by teachers. This a free site. Please visit and I hope it will help in your teaching