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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 10 · 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. 2.42² =
  3. 3.54² =
  4. 4.54² =
  5. 5.49² =
  6. 6.54² =
  7. 7.43² =
  8. 8.52² =
  9. 9.48² =
  10. 10.53² =
  11. 11.59² =
  12. 12.55² =
  13. 13.47² =
  14. 14.58² =
  15. 15.42² =
  16. 16.55² =
  17. 17.58² =
  18. 18.43² =
  19. 19.59² =
  20. 20.47² =
  21. 21.55² =
  22. 22.49² =
  23. 23.44² =
  24. 24.47² =
  25. 25.51² =
  26. 26.47² =
  27. 27.49² =
  28. 28.53² =
  29. 29.46² =
  30. 30.49² =
  31. 31.42² =
  32. 32.52² =
  33. 33.43² =
  34. 34.44² =
  35. 35.43² =
  36. 36.53² =
  37. 37.41² =
  38. 38.43² =
  39. 39.55² =
  40. 40.55² =

Answer key

  1. 3364
  2. 1764
  3. 2916
  4. 2916
  5. 2401
  6. 2916
  7. 1849
  8. 2704
  9. 2304
  10. 2809
  11. 3481
  12. 3025
  13. 2209
  14. 3364
  15. 1764
  16. 3025
  17. 3364
  18. 1849
  19. 3481
  20. 2209
  21. 3025
  22. 2401
  23. 1936
  24. 2209
  25. 2601
  26. 2209
  27. 2401
  28. 2809
  29. 2116
  30. 2401
  31. 1764
  32. 2704
  33. 1849
  34. 1936
  35. 1849
  36. 2809
  37. 1681
  38. 1849
  39. 3025
  40. 3025

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