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Find the new mean after adding a value

Year 6 maths · Fieldbook Learning

Name ______________________ Date __________

Find the old total, add the new number, and divide by the new count.

  1. The mean of 5 numbers is 9. A new number, 3, is added. What is the mean of all 6 numbers?
  2. The mean of 5 numbers is 9. A new number, 15, is added. What is the mean of all 6 numbers?
  3. The mean of 4 numbers is 5. A new number, 15, is added. What is the mean of all 5 numbers?
  4. The mean of 3 numbers is 7. A new number, 19, is added. What is the mean of all 4 numbers?
  5. The mean of 6 numbers is 15. A new number, 8, is added. What is the mean of all 7 numbers?
  6. The mean of 6 numbers is 9. A new number, 2, is added. What is the mean of all 7 numbers?
  7. The mean of 5 numbers is 18. A new number, 24, is added. What is the mean of all 6 numbers?
  8. The mean of 5 numbers is 7. A new number, 25, is added. What is the mean of all 6 numbers?
  9. The mean of 8 numbers is 27. A new number, 0, is added. What is the mean of all 9 numbers?
  10. The mean of 5 numbers is 26. A new number, 38, is added. What is the mean of all 6 numbers?
  11. The mean of 7 numbers is 29. A new number, 61, is added. What is the mean of all 8 numbers?
  12. The mean of 8 numbers is 22. A new number, 31, is added. What is the mean of all 9 numbers?
  13. The mean of 7 numbers is 57. A new number, 33, is added. What is the mean of all 8 numbers?
  14. The mean of 6 numbers is 29. A new number, 57, is added. What is the mean of all 7 numbers?
  15. The mean of 10 numbers is 34. A new number, 23, is added. What is the mean of all 11 numbers?
  16. The mean of 8 numbers is 53. A new number, 89, is added. What is the mean of all 9 numbers?
  17. The mean of 14 numbers is 70. A new number, 40, is added. What is the mean of all 15 numbers?
  18. The mean of 11 numbers is 61. A new number, 37, is added. What is the mean of all 12 numbers?
  19. The mean of 15 numbers is 82. A new number, 98, is added. What is the mean of all 16 numbers?
  20. The mean of 14 numbers is 93. A new number, 78, is added. What is the mean of all 15 numbers?
More free practice: fieldbooklearning.com/au/practice/year-6/mean-after-adding-a-value/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
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Answer key: Find the new mean after adding a value

  1. 8
  2. 10
  3. 7
  4. 10
  5. 14
  6. 8
  7. 19
  8. 10
  9. 24
  10. 28
  11. 33
  12. 23
  13. 54
  14. 33
  15. 33
  16. 57
  17. 68
  18. 59
  19. 83
  20. 92