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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 5 · 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. 1.44² =
  2. 2.46² =
  3. 3.52² =
  4. 4.43² =
  5. 5.43² =
  6. 6.49² =
  7. 7.52² =
  8. 8.49² =
  9. 9.45² =
  10. 10.46² =
  11. 11.43² =
  12. 12.57² =
  13. 13.46² =
  14. 14.49² =
  15. 15.51² =
  16. 16.57² =
  17. 17.56² =
  18. 18.42² =
  19. 19.59² =
  20. 20.55² =
  21. 21.53² =
  22. 22.59² =
  23. 23.56² =
  24. 24.52² =
  25. 25.41² =
  26. 26.54² =
  27. 27.41² =
  28. 28.54² =
  29. 29.41² =
  30. 30.46² =
  31. 31.53² =
  32. 32.41² =
  33. 33.54² =
  34. 34.49² =
  35. 35.43² =
  36. 36.59² =
  37. 37.41² =
  38. 38.45² =
  39. 39.55² =
  40. 40.57² =

Answer key

  1. 1936
  2. 2116
  3. 2704
  4. 1849
  5. 1849
  6. 2401
  7. 2704
  8. 2401
  9. 2025
  10. 2116
  11. 1849
  12. 3249
  13. 2116
  14. 2401
  15. 2601
  16. 3249
  17. 3136
  18. 1764
  19. 3481
  20. 3025
  21. 2809
  22. 3481
  23. 3136
  24. 2704
  25. 1681
  26. 2916
  27. 1681
  28. 2916
  29. 1681
  30. 2116
  31. 2809
  32. 1681
  33. 2916
  34. 2401
  35. 1849
  36. 3481
  37. 1681
  38. 2025
  39. 3025
  40. 3249

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