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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 3 · 40 questions
TalentJR

The fast method (From 25 and the gap): Find the gap from 50: 53 is 50 + 3, 46 is 50 − 4. First part: 25 + gap above 50, or 25 − gap below 50. Last two digits: the gap squared, written as 2 digits — 3² = 09. Join them: 53² = 28|09 = 2809.

NameDateTime takenScore ___ / 40
  1. 1.58² =
  2. 2.47² =
  3. 3.41² =
  4. 4.41² =
  5. 5.51² =
  6. 6.56² =
  7. 7.41² =
  8. 8.47² =
  9. 9.49² =
  10. 10.56² =
  11. 11.52² =
  12. 12.56² =
  13. 13.41² =
  14. 14.59² =
  15. 15.44² =
  16. 16.48² =
  17. 17.46² =
  18. 18.58² =
  19. 19.48² =
  20. 20.45² =
  21. 21.48² =
  22. 22.56² =
  23. 23.58² =
  24. 24.51² =
  25. 25.53² =
  26. 26.44² =
  27. 27.49² =
  28. 28.57² =
  29. 29.54² =
  30. 30.47² =
  31. 31.42² =
  32. 32.47² =
  33. 33.43² =
  34. 34.41² =
  35. 35.56² =
  36. 36.45² =
  37. 37.41² =
  38. 38.56² =
  39. 39.45² =
  40. 40.53² =

Answer key

  1. 3364
  2. 2209
  3. 1681
  4. 1681
  5. 2601
  6. 3136
  7. 1681
  8. 2209
  9. 2401
  10. 3136
  11. 2704
  12. 3136
  13. 1681
  14. 3481
  15. 1936
  16. 2304
  17. 2116
  18. 3364
  19. 2304
  20. 2025
  21. 2304
  22. 3136
  23. 3364
  24. 2601
  25. 2809
  26. 1936
  27. 2401
  28. 3249
  29. 2916
  30. 2209
  31. 1764
  32. 2209
  33. 1849
  34. 1681
  35. 3136
  36. 2025
  37. 1681
  38. 3136
  39. 2025
  40. 2809

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