Rounding

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Rounding

  1. 1. Rounding Numbers
  2. 2. When do you use rounding? <ul><li>When the question asks you to estimate. </li></ul><ul><li>When the question asks “about how many”…? </li></ul><ul><li>When an exact answer isn’t possible. </li></ul><ul><li>When an answer is difficult to obtain. </li></ul>
  3. 3. Memorize this Poem Find your number. Look right next door. 4 or less you just ignore. 5 or up, add 1 more. Are we done yet? No, not quite. Add zeroes to the right.
  4. 4. 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.
  5. 5. 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.
  6. 6. 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.
  7. 7. Round this number to the nearest ten thousand. 5 or up, add 1 more. 3 6 8,9 7 1 Add 1 to the 6. +1
  8. 8. Round this number to the nearest ten thousand. Are we done yet? No, not quite. Add zeroes to the right. 3 Add 1 to the 6. 6 8,9 7 1 7 0,000
  9. 9. The Answer 368,971 rounded to the nearest ten thousand is 3 7 0,0 0 0
  10. 10. Round this number to the nearest thousand. Find your number. 3 5, 3 2 7 Circle the number in the thousands place.
  11. 11. 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.
  12. 12. 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.
  13. 13. Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 327
  14. 14. Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 0 0 0 327 Are we done yet? No, not quite. Add zeroes to the right.
  15. 15. The Answer 35,327 rounded to the nearest thousand is 3 5, 0 0 0
  16. 16. Round this number to the nearest dollar. Find your number. $ 5. 8 7 Circle the number where the dollars are.
  17. 17. Round this number to the nearest dollar. Look right next door. $ 5. 8 7 Draw an arrow to the right of the circled number.
  18. 18. 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.
  19. 19. Round this number to the nearest dollar. 5 or up, add 1 more. $ 5. 8 7 Since 8 is greater than 5 add 1 to the 5. +1
  20. 20. Round this number to the nearest dollar. 5 or more, add 1 more. $ 6. 5 0 0 87 Are we done yet? No, not quite. Add zeroes to the right.
  21. 21. The Answer $5.87 rounded to the nearest dollar is $ 6. 0 0
  22. 22. Round this number to the nearest tenth place. Find your number. 4. 8 7 1 Circle the number in the tenths place.
  23. 23. Round this number to the nearest tenth place. Look right next door. 4. 8 7 1 Draw an arrow to the right of the circled number.
  24. 24. Round this number to the nearest tenth place. 4 or less just ignore. 4. 8 7 1 7 is greater than 4 so go to the next line of the poem.
  25. 25. Round this number to the nearest tenth place. 5 or up, add 1 more. 4. 8 7 1 Since 7 is greater than 5, add 1 to the 8. +1
  26. 26. Round this number to the nearest tenth place. 5 or up, add 1 more. 4. Are we done yet? No, not quite. Add zeroes to the right. 9 871 00
  27. 27. The Answer 4.871 rounded to the nearest tenth place is 4. 900
  28. 28. Round this number to the nearest whole number. Find your number. 4. 8 7 1 Circle the number in the ones place.
  29. 29. Round this number to the nearest tenth place. Look right next door. 4. 8 7 1 Draw an arrow to the right of the circled number.
  30. 30. Round this number to the nearest tenth place. 4 or less just ignore. 4. 8 7 1 8 is greater than 4 so go to the next line of the poem.
  31. 31. Round this number to the nearest tenth place. 5 or up, add 1 more. 4. 8 7 1 Since 8 is greater than 5, add 1 to the 4. +1
  32. 32. Round this number to the nearest tenth place. 5 or up, add 1 more. 4. Are we done yet? No, not quite. Add zeroes to the right. 5. 871 000
  33. 33. The Answer 4.871 rounded to the nearest whole number 5. 000

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