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Rounding Numbers

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    Rounding Numbers Rounding Numbers Presentation Transcript

      • BELL RINGER
      • 19 + 26 + 23 =
      • 68
      • +48
      • List these in decreasing order of length:
      • 3 cm, 3 m, 3 mm
      • What is six hours after 2 p.m.?
      • 5. One cup of popcorn kernels makes four cups of popped corn. There are six cups of kernels in a bag. How many cups of popped corn will one bag make?
      68 116 3 m, 3 cm, 3mm 8 p.m. 24 cups
    • PLACE VALUE REVIEW Find the place value for the digit 7. 572,163 ten-thousand 726,468 hundred-thousand 268,317 ones 649,752 hundreds 46,971 tens
    • ROUNDING
    • THE ROUNDING POEM Find your number. Look right next door. 4 or less just ignore. 5 or more, add 1 more.
    • Round this number to the nearest ten thousand. Find your number. 3 6 8,9 7 1 Circle the number in the ten thousands place.
    • Round this number to the nearest ten thousand. Look right next door. 3 6 8,9 7 1 Draw an arrow to the right of the number.
    • Round this number to the nearest ten thousand. 4 or less, just ignore. 3 6 8,9 7 1 8 is larger than 4 so go to the next line of the poem.
    • Round this number to the nearest ten thousand. 5 or more, add 1 more. 3 6 8,9 7 1 Add 1 to the 6. +1
    • Round this number to the nearest ten thousand. 5 or more, add 1 more. 3 7 0,0 0 0 Add 1 to the 6 and all the numbers to the right of the 7 become 0’s.
    • The Answer 368,971 rounded to the nearest ten thousand is 3 7 0,0 0 0
    • Round this number to the nearest thousand. Find your number. 3 5, 3 2 7 Circle the number in the thousands place.
    • Round this number to the nearest thousand. Look right next door. 3 5, 3 2 7 Draw an arrow to the right of the number.
    • Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 3 2 7 Since 3 is less than 4 we do not change the 5.
    • Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 0 0 0 Change the numbers to left of 5 to 0’s.
    • The Answer 35,327 rounded to the nearest thousand is 3 5, 0 0 0
    • Round this number to the nearest dollar. Find your number. $ 5. 8 7 Circle the number where the dollars are.
    • Round this number to the nearest dollar. Look right next door. $ 5. 8 7 Draw an arrow to the right of the circled number.
    • Round this number to the nearest dollar. 4 or less, just ignore. $ 5. 8 7 8 is greater than 4 so go to the next line of the poem.
    • Round this number to the nearest dollar. 5 or more, add 1 more. $ 5. 8 7 Since 8 is greater than 5 add 1 to the 5. +1
    • Round this number to the nearest dollar. 5 or more, add 1 more. $ 6. 0 0 Change the 5 to a 6 and change all the numbers to the right to 0’s.
    • The Answer $5.87 rounded to the nearest dollar is $ 6. 0 0
    • Round this number to the nearest hundred. 6,480 6,500
    • Round this number to the nearest tens. 7,239 7,240
    • Round this number to the nearest thousands. 28,731 29,000
    • Round this number to the nearest hundred thousands. 289,962 300,000