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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 7 · 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. 1.47² =
  2. 2.43² =
  3. 3.59² =
  4. 4.56² =
  5. 5.48² =
  6. 6.52² =
  7. 7.48² =
  8. 8.41² =
  9. 9.49² =
  10. 10.41² =
  11. 11.44² =
  12. 12.58² =
  13. 13.49² =
  14. 14.41² =
  15. 15.57² =
  16. 16.48² =
  17. 17.49² =
  18. 18.45² =
  19. 19.41² =
  20. 20.56² =
  21. 21.49² =
  22. 22.42² =
  23. 23.53² =
  24. 24.41² =
  25. 25.52² =
  26. 26.43² =
  27. 27.45² =
  28. 28.49² =
  29. 29.41² =
  30. 30.41² =
  31. 31.42² =
  32. 32.58² =
  33. 33.44² =
  34. 34.44² =
  35. 35.43² =
  36. 36.51² =
  37. 37.44² =
  38. 38.42² =
  39. 39.53² =
  40. 40.44² =

Answer key

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

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