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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 4 · 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. 1.45² =
  2. 2.46² =
  3. 3.42² =
  4. 4.48² =
  5. 5.44² =
  6. 6.44² =
  7. 7.51² =
  8. 8.41² =
  9. 9.52² =
  10. 10.44² =
  11. 11.41² =
  12. 12.58² =
  13. 13.47² =
  14. 14.49² =
  15. 15.49² =
  16. 16.42² =
  17. 17.54² =
  18. 18.56² =
  19. 19.49² =
  20. 20.44² =
  21. 21.41² =
  22. 22.57² =
  23. 23.58² =
  24. 24.46² =
  25. 25.49² =
  26. 26.53² =
  27. 27.47² =
  28. 28.55² =
  29. 29.58² =
  30. 30.49² =
  31. 31.44² =
  32. 32.46² =
  33. 33.54² =
  34. 34.44² =
  35. 35.58² =
  36. 36.41² =
  37. 37.42² =
  38. 38.47² =
  39. 39.55² =
  40. 40.57² =

Answer key

  1. 2025
  2. 2116
  3. 1764
  4. 2304
  5. 1936
  6. 1936
  7. 2601
  8. 1681
  9. 2704
  10. 1936
  11. 1681
  12. 3364
  13. 2209
  14. 2401
  15. 2401
  16. 1764
  17. 2916
  18. 3136
  19. 2401
  20. 1936
  21. 1681
  22. 3249
  23. 3364
  24. 2116
  25. 2401
  26. 2809
  27. 2209
  28. 3025
  29. 3364
  30. 2401
  31. 1936
  32. 2116
  33. 2916
  34. 1936
  35. 3364
  36. 1681
  37. 1764
  38. 2209
  39. 3025
  40. 3249

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