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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 13 · 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. 1.53² =
  2. 2.46² =
  3. 3.52² =
  4. 4.45² =
  5. 5.41² =
  6. 6.57² =
  7. 7.54² =
  8. 8.47² =
  9. 9.55² =
  10. 10.57² =
  11. 11.59² =
  12. 12.55² =
  13. 13.47² =
  14. 14.49² =
  15. 15.55² =
  16. 16.51² =
  17. 17.57² =
  18. 18.56² =
  19. 19.46² =
  20. 20.57² =
  21. 21.57² =
  22. 22.56² =
  23. 23.58² =
  24. 24.42² =
  25. 25.47² =
  26. 26.55² =
  27. 27.47² =
  28. 28.45² =
  29. 29.43² =
  30. 30.41² =
  31. 31.47² =
  32. 32.54² =
  33. 33.57² =
  34. 34.56² =
  35. 35.54² =
  36. 36.58² =
  37. 37.55² =
  38. 38.56² =
  39. 39.49² =
  40. 40.41² =

Answer key

  1. 2809
  2. 2116
  3. 2704
  4. 2025
  5. 1681
  6. 3249
  7. 2916
  8. 2209
  9. 3025
  10. 3249
  11. 3481
  12. 3025
  13. 2209
  14. 2401
  15. 3025
  16. 2601
  17. 3249
  18. 3136
  19. 2116
  20. 3249
  21. 3249
  22. 3136
  23. 3364
  24. 1764
  25. 2209
  26. 3025
  27. 2209
  28. 2025
  29. 1849
  30. 1681
  31. 2209
  32. 2916
  33. 3249
  34. 3136
  35. 2916
  36. 3364
  37. 3025
  38. 3136
  39. 2401
  40. 1681

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