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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 15 · 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. 1.51² =
  2. 2.58² =
  3. 3.47² =
  4. 4.55² =
  5. 5.41² =
  6. 6.58² =
  7. 7.59² =
  8. 8.48² =
  9. 9.52² =
  10. 10.41² =
  11. 11.46² =
  12. 12.59² =
  13. 13.41² =
  14. 14.46² =
  15. 15.48² =
  16. 16.57² =
  17. 17.55² =
  18. 18.58² =
  19. 19.49² =
  20. 20.44² =
  21. 21.52² =
  22. 22.42² =
  23. 23.54² =
  24. 24.54² =
  25. 25.48² =
  26. 26.48² =
  27. 27.48² =
  28. 28.43² =
  29. 29.47² =
  30. 30.45² =
  31. 31.47² =
  32. 32.41² =
  33. 33.55² =
  34. 34.43² =
  35. 35.51² =
  36. 36.48² =
  37. 37.55² =
  38. 38.49² =
  39. 39.56² =
  40. 40.58² =

Answer key

  1. 2601
  2. 3364
  3. 2209
  4. 3025
  5. 1681
  6. 3364
  7. 3481
  8. 2304
  9. 2704
  10. 1681
  11. 2116
  12. 3481
  13. 1681
  14. 2116
  15. 2304
  16. 3249
  17. 3025
  18. 3364
  19. 2401
  20. 1936
  21. 2704
  22. 1764
  23. 2916
  24. 2916
  25. 2304
  26. 2304
  27. 2304
  28. 1849
  29. 2209
  30. 2025
  31. 2209
  32. 1681
  33. 3025
  34. 1849
  35. 2601
  36. 2304
  37. 3025
  38. 2401
  39. 3136
  40. 3364

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