2. NOTATION & ROUNDING Math Learning e-Resource Center Open University Malaysia

3. THOUSAND S HUNDRED S TEN S ONE S DECIMAL POINT TEN THS HUNDRED THS THOUSAND THS TEN THOUSAND THS HUNDRED THOUSAND THS 1 000100101 ∙ 1/ 10 1/ 100 1/ 1 000 1/ 10 000 1/ 100 000 PLACE VALUE © Math Learning e-Resource Center

4. TENTHS 5/10 = 0.5 HUNDREDTHS 6/100 = 0.06 THOUSANDTHS 7/1000 = 0.007 TEN-THOUSANDTHS 8/10 000 = 0.0008 HUNDRED-THOUSANDTHS 9/100 000 = 0.00009 -NOTATION- NEXT © Math Learning e-Resource Center

5. Identify Place Value Look at the Right Side Digit Leave the digit that needs to be rounded as it is. Add 1 to the digit that needs to be rounded. Replace the numbers to its right with zeros If 5 and above If Less than 5 STEPS: ROUNDING DECIMALS NEXT © Math Learning e-Resource Center

6. TENTHS 5/10 = 0.5 HUNDREDTHS 6/100 = 0.06 THOUSANDTHS 7/1000 = 0.007 TEN-THOUSANDTHS 8/10 000 = 0.0008 HUNDRED-THOUSANDTHS 9/100 000 = 0.00009 -ROUNDING- © Math Learning e-Resource Center

7. Example: 27.59 Number 5 is in tenths column. To its right is 9 which is more than 5. Add 1 to that column,s0 the answer is 27.60 or can be written as 27.6 NEXT © Math Learning e-Resource Center

8. Example: 763.84 Digit 8 is in tenths column. To its right is 4 which is less than 5 Leave the digit as it is, so the answer is 763.80 or can be written as 763.8 BACK © Math Learning e-Resource Center

9. Example: 0.786 Number 8 is in hundredths column. To its right is 6 which is more than 5. Add 1 to that column, so the answer is 0.790 or can be written as 0.79 NEXT © Math Learning e-Resource Center

10. Example: 0.152 Digit 5 is in hundredths column. To its right is 2 which is less than 5 Leave the digit as it is, so the answer is 0.150 or can be written as 0.15. BACK © Math Learning e-Resource Center

11. Example: 12.9599 Number 9 is in thousandths column. To its right is 9 which is more than 5. Add 1 to that column, so the answer is 12.9600 or can be written as 12.96 NEXT © Math Learning e-Resource Center

12. Example: 84.6493 Digit 9 is in thousandths column. To its right is 3 which is less than 5 Leave the digit as it is, so the answer is 84.6490 or can be written as 84.649 BACK © Math Learning e-Resource Center

13. Example: 0.026873 Number 8 is in ten-thousandths column. To its right is 7 which is more than 5. Add 1 to that column, so the answer is 0.026900 or can be written as 0.0269 NEXT © Math Learning e-Resource Center

14. Example: 0.085 5 13 Number 5 is in ten-thousandths column. To its right is 1 which is less than 5. Leave the digit as it is, so the answer is 0.085500 or can be written as 0.0855 BACK © Math Learning e-Resource Center

15. Example: 5.026439 Number 3 is in hundred- thousandths column. To its right is 9 which is more than 5. Add 1 to that column, so the answer is 5.026440 or can be written as 5.02644 NEXT © Math Learning e-Resource Center

16. Example: 4.0858632 Number 6 is in hundred- thousandths column. To its right is 3 which is less than 5. Leave the digit as it is, so the answer is 4.0858600 or can be written as 4.08586 END SLIDE END SLIDE BACK © Math Learning e-Resource Center

17. END SLIDE -THANK YOU- © Math Learning e-Resource Center

18. Basic Math: Decimal - Notation and rounding by Open University Malaysia is licensed under a Creative Commons Attribution-Noncommercial 3.0 Unported License. Based on a work at http://oer.oum.edu.my. Permissions beyond the scope of this license may be available at http://www.oum.edu.my.Open University Malaysia Creative Commons Attribution-Noncommercial 3.0 Unported License http://oer.oum.edu.my http://www.oum.edu.my