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 ||| 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 <<< !!! ||| 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 ||| WholeNumberPlaceValue.docx 7/8/2016 9:46:00 PM - D.R.S. ||| all original content, none is from Pearson Education, Inc.

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