Whole Number Place Values
Know the Place Value Names / Know how to translate from numbers to words
This is the
Ones
PERIOD
Hundred Thousands
Ten Thousands
Thousands
Hundreds
Tens
Ones
How to write a Whole
Number in Words
Millions
This is the
Thousands
PERIOD
Ten Millions
Hundred Millions
Billions
This is the
Millions
PERIOD
3
8
4
0
1
2
9
5
Thirty-eight
million
For each period, left to right:
 The whole number in
that period in words
four
hundred one
thousand
two hundred
ninety-five
 Followed by the place
value name of that
period (except for the
Ones)
 The word “AND” isn’t
used here! Don’t put
an “AND” in there.
ROUNDING: look at the next digit and make the decision based on “Is it 5 or higher?”
35,353,535 round to the nearest million is 35,000,000
35,353,535 round to the nearest thousand is 35,354,000
2,100 round to the nearest hundred is still 2,100
>>> 199,999 round to the nearest hundred is 200,000 <<< !!!
Math 0987
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WholeNumberPlaceValue.docx 7/8/2016 9:46:00 PM - D.R.S.
150 round to the nearest hundred is 200
149 round to the nearest hundred is 100
50 round to the neared hundred is 100
>>> 49 round to the nearest hundred is 0 <<< !!!
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all original content, none is from Pearson Education, Inc.
ESTIMATING ARITHMETIC BY USING ROUNDING AND NO CALCULATOR: Round each number to a single digit
followed by zeros. Do the arithmetic without a calculator because that’s the whole point of estimating!
488 + 735
round to 500 + 700, answer 1,200 (actual 1,233)
488 + 1,572
round to 500 + 2000, answer 2,500 (actual 2,060)
6,397 – 4,800 round to 6,000 – 5,000, answer 1,000 (actual 1,597)
278 × 537
round to 300 × 500, answer 150,000 (actual 149,286)
Note: 3 × 5 is 15, and count the zeros, we have four zeros, so take 15 and tack on four zeros to get the 150,000
Math 0987
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WholeNumberPlaceValue.docx 7/8/2016 9:46:00 PM - D.R.S.
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all original content, none is from Pearson Education, Inc.