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Squares Near 50 Worksheet

Speed calculation lesson 25: Squares near 50 · Set 6 · 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. 1.52² =
  2. 2.51² =
  3. 3.48² =
  4. 4.48² =
  5. 5.44² =
  6. 6.59² =
  7. 7.45² =
  8. 8.43² =
  9. 9.53² =
  10. 10.41² =
  11. 11.59² =
  12. 12.43² =
  13. 13.59² =
  14. 14.57² =
  15. 15.44² =
  16. 16.57² =
  17. 17.42² =
  18. 18.45² =
  19. 19.41² =
  20. 20.45² =
  21. 21.59² =
  22. 22.41² =
  23. 23.48² =
  24. 24.57² =
  25. 25.46² =
  26. 26.42² =
  27. 27.42² =
  28. 28.52² =
  29. 29.53² =
  30. 30.52² =
  31. 31.51² =
  32. 32.59² =
  33. 33.56² =
  34. 34.57² =
  35. 35.48² =
  36. 36.58² =
  37. 37.45² =
  38. 38.48² =
  39. 39.51² =
  40. 40.41² =

Answer key

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

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