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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 12 · 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. 2.44² =
  3. 3.47² =
  4. 4.49² =
  5. 5.53² =
  6. 6.51² =
  7. 7.55² =
  8. 8.42² =
  9. 9.56² =
  10. 10.49² =
  11. 11.55² =
  12. 12.44² =
  13. 13.45² =
  14. 14.49² =
  15. 15.52² =
  16. 16.56² =
  17. 17.46² =
  18. 18.46² =
  19. 19.44² =
  20. 20.52² =
  21. 21.44² =
  22. 22.42² =
  23. 23.53² =
  24. 24.52² =
  25. 25.57² =
  26. 26.43² =
  27. 27.56² =
  28. 28.41² =
  29. 29.46² =
  30. 30.52² =
  31. 31.53² =
  32. 32.56² =
  33. 33.48² =
  34. 34.56² =
  35. 35.42² =
  36. 36.55² =
  37. 37.42² =
  38. 38.47² =
  39. 39.51² =
  40. 40.51² =

Answer key

  1. 3364
  2. 1936
  3. 2209
  4. 2401
  5. 2809
  6. 2601
  7. 3025
  8. 1764
  9. 3136
  10. 2401
  11. 3025
  12. 1936
  13. 2025
  14. 2401
  15. 2704
  16. 3136
  17. 2116
  18. 2116
  19. 1936
  20. 2704
  21. 1936
  22. 1764
  23. 2809
  24. 2704
  25. 3249
  26. 1849
  27. 3136
  28. 1681
  29. 2116
  30. 2704
  31. 2809
  32. 3136
  33. 2304
  34. 3136
  35. 1764
  36. 3025
  37. 1764
  38. 2209
  39. 2601
  40. 2601

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