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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 11 · 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. 1.56² =
  2. 2.46² =
  3. 3.58² =
  4. 4.56² =
  5. 5.51² =
  6. 6.57² =
  7. 7.48² =
  8. 8.44² =
  9. 9.51² =
  10. 10.49² =
  11. 11.44² =
  12. 12.51² =
  13. 13.42² =
  14. 14.49² =
  15. 15.44² =
  16. 16.46² =
  17. 17.57² =
  18. 18.56² =
  19. 19.54² =
  20. 20.51² =
  21. 21.56² =
  22. 22.55² =
  23. 23.48² =
  24. 24.42² =
  25. 25.48² =
  26. 26.53² =
  27. 27.47² =
  28. 28.54² =
  29. 29.42² =
  30. 30.44² =
  31. 31.52² =
  32. 32.58² =
  33. 33.48² =
  34. 34.54² =
  35. 35.49² =
  36. 36.46² =
  37. 37.56² =
  38. 38.49² =
  39. 39.55² =
  40. 40.48² =

Answer key

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

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