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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 1 · 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. 2.51² =
  3. 3.42² =
  4. 4.46² =
  5. 5.43² =
  6. 6.43² =
  7. 7.57² =
  8. 8.41² =
  9. 9.48² =
  10. 10.48² =
  11. 11.47² =
  12. 12.48² =
  13. 13.52² =
  14. 14.53² =
  15. 15.46² =
  16. 16.52² =
  17. 17.48² =
  18. 18.48² =
  19. 19.43² =
  20. 20.43² =
  21. 21.42² =
  22. 22.45² =
  23. 23.41² =
  24. 24.51² =
  25. 25.48² =
  26. 26.42² =
  27. 27.48² =
  28. 28.59² =
  29. 29.49² =
  30. 30.51² =
  31. 31.53² =
  32. 32.49² =
  33. 33.56² =
  34. 34.55² =
  35. 35.58² =
  36. 36.51² =
  37. 37.57² =
  38. 38.44² =
  39. 39.57² =
  40. 40.48² =

Answer key

  1. 2025
  2. 2601
  3. 1764
  4. 2116
  5. 1849
  6. 1849
  7. 3249
  8. 1681
  9. 2304
  10. 2304
  11. 2209
  12. 2304
  13. 2704
  14. 2809
  15. 2116
  16. 2704
  17. 2304
  18. 2304
  19. 1849
  20. 1849
  21. 1764
  22. 2025
  23. 1681
  24. 2601
  25. 2304
  26. 1764
  27. 2304
  28. 3481
  29. 2401
  30. 2601
  31. 2809
  32. 2401
  33. 3136
  34. 3025
  35. 3364
  36. 2601
  37. 3249
  38. 1936
  39. 3249
  40. 2304

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