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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 414 · 40 questions
TalentJR

How to do it in your head (Up and down): Find how far the number is from the nearest ten (the distance). Go that distance up and the same distance down, and multiply the two new numbers. Add the distance squared.

NameDateTime takenScore ___ / 40
  1. 1.71² =
  2. 2.56² =
  3. 3.85² =
  4. 4.49² =
  5. 5.53² =
  6. 6.83² =
  7. 7.81² =
  8. 8.61² =
  9. 9.76² =
  10. 10.43² =
  11. 11.41² =
  12. 12.59² =
  13. 13.48² =
  14. 14.68² =
  15. 15.64² =
  16. 16.33² =
  17. 17.51² =
  18. 18.82² =
  19. 19.44² =
  20. 20.99² =
  21. 21.58² =
  22. 22.75² =
  23. 23.42² =
  24. 24.35² =
  25. 25.78² =
  26. 26.63² =
  27. 27.89² =
  28. 28.31² =
  29. 29.37² =
  30. 30.38² =
  31. 31.77² =
  32. 32.34² =
  33. 33.45² =
  34. 34.54² =
  35. 35.62² =
  36. 36.87² =
  37. 37.91² =
  38. 38.57² =
  39. 39.93² =
  40. 40.94² =

Answer key

  1. 5041
  2. 3136
  3. 7225
  4. 2401
  5. 2809
  6. 6889
  7. 6561
  8. 3721
  9. 5776
  10. 1849
  11. 1681
  12. 3481
  13. 2304
  14. 4624
  15. 4096
  16. 1089
  17. 2601
  18. 6724
  19. 1936
  20. 9801
  21. 3364
  22. 5625
  23. 1764
  24. 1225
  25. 6084
  26. 3969
  27. 7921
  28. 961
  29. 1369
  30. 1444
  31. 5929
  32. 1156
  33. 2025
  34. 2916
  35. 3844
  36. 7569
  37. 8281
  38. 3249
  39. 8649
  40. 8836

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