Math Learning eResource Center Open University Malaysia DECIMALS

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

PLACE VALUE THOUSANDS HUNDREDS TENS ONES DECIMAL POINT TENTHS HUNDREDTHS THOUSANDTHS TEN THOUSANDTHS HUNDRED THOUSANDTHS 1 000 10 1 ∙ 1/ 100 1/ 1 000 1/ 100 000 © Math Learning e-Resource Center

-NOTATIONTENTHS 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 NEXT © Math Learning e-Resource Center

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

ch e a e se e k ic d to pl l C u am o x cl e e th -ROUNDINGS TENTH. 5 5/10 = 0 THS D N A S THOU 0. 007 = 0 0 0 7/1 HUNDR EDTHS 6/100 = 0. 06 TEN-THOU SANDTHS 8/10 000 = 0. 0008 HUNDRED-THOUSAND THS 9/100 000 = 0. 00009 © Math Learning e-Resource Center

• Example: 27. 59 • Number 5 is in tenths column. To its right is 9 which is more than 5. • Add 1 to that column, s 0 the answer is 27. 60 or can be written as 27. 6 NEXT © Math Learning e-Resource Center

• 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

• 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

• 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

• 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 © Math Learning e-Resource Center NEXT

• 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

• 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 © Math Learning e-Resource Center NEXT

• Example: • 0. 085513 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

• 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 © Math Learning e-Resource Center NEXT

• 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 BACK © Math Learning e-Resource Center END SLIDE

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

© Math Learning e-Resource Center 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.