NOTATION & ROUNDING Math Learning e-Resource Center Open University Malaysia.
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DECIMALS
NOTATION&
ROUNDING
Math Learning e-Resource CenterOpen University Malaysia
THOUSANDS
HUNDREDS
TENS
ONES
DECIMAL POINT
TENTHS
HUNDREDTHS
THOUSANDTHS
TENTHOUSANDTHS
HUNDRED
THOUSANDTH
S
1 000 100 10 1 ∙ 1/
101/
100
1/1
000
1/10
000
1/100 000
PLACE VALUE
© Math Learning e-Resource Center
TENTHS5/10 = 0.5 HUNDREDTH
S6/100 = 0.06
THOUSANDTHS
7/1000 = 0.007 TEN-
THOUSANDTHS8/10 000 = 0.0008
HUNDRED-THOUSANDTHS9/100 000 = 0.00009
-NOTATION-
NEXT© Math Learning e-Resource Center
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
rightwith zeros
If5 and above
IfLess than
5
STEPS: ROUNDING DECIMALS
NEXT© Math Learning e-Resource Center
TENTHS
5/10 = 0.5HUNDREDTHS6/100 = 0.06
THOUSANDT
HS7/1000 =
0.007
TEN-THOUSANDTHS8/10 000 = 0.0008
HUNDRED-THOUSANDTHS9/100 000 = 0.00009
-ROUNDING-
Click e
ach
clou
d to see
the
exam
ple
© 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,s0 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 0.79NEXT
© 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 12.96NEXT
© Math Learning e-Resource Center
•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
NEXT
© Math Learning e-Resource Center
•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
NEXT
© Math Learning e-Resource Center
•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 4.08586END SLIDE
BACK
© Math Learning e-Resource Center
END SLIDE-THANK YOU-
© M
ath
Le
arn
ing
e-R
eso
urce
Ce
nte
r
© M
ath
Le
arn
ing
e-R
eso
urce
Ce
nte
r
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.
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