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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 14 · 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. 1.46² =
  2. 2.42² =
  3. 3.48² =
  4. 4.55² =
  5. 5.41² =
  6. 6.51² =
  7. 7.44² =
  8. 8.46² =
  9. 9.58² =
  10. 10.46² =
  11. 11.49² =
  12. 12.55² =
  13. 13.56² =
  14. 14.51² =
  15. 15.47² =
  16. 16.52² =
  17. 17.45² =
  18. 18.51² =
  19. 19.49² =
  20. 20.44² =
  21. 21.52² =
  22. 22.58² =
  23. 23.49² =
  24. 24.47² =
  25. 25.51² =
  26. 26.48² =
  27. 27.58² =
  28. 28.56² =
  29. 29.41² =
  30. 30.49² =
  31. 31.59² =
  32. 32.53² =
  33. 33.44² =
  34. 34.44² =
  35. 35.44² =
  36. 36.52² =
  37. 37.49² =
  38. 38.55² =
  39. 39.58² =
  40. 40.46² =

Answer key

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

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