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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 495 · 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. 1.41² =
  2. 2.54² =
  3. 3.64² =
  4. 4.91² =
  5. 5.47² =
  6. 6.51² =
  7. 7.35² =
  8. 8.75² =
  9. 9.93² =
  10. 10.88² =
  11. 11.44² =
  12. 12.67² =
  13. 13.73² =
  14. 14.89² =
  15. 15.61² =
  16. 16.95² =
  17. 17.63² =
  18. 18.32² =
  19. 19.65² =
  20. 20.39² =
  21. 21.36² =
  22. 22.87² =
  23. 23.79² =
  24. 24.42² =
  25. 25.58² =
  26. 26.99² =
  27. 27.49² =
  28. 28.76² =
  29. 29.37² =
  30. 30.85² =
  31. 31.52² =
  32. 32.46² =
  33. 33.34² =
  34. 34.84² =
  35. 35.82² =
  36. 36.57² =
  37. 37.68² =
  38. 38.98² =
  39. 39.77² =
  40. 40.56² =

Answer key

  1. 1681
  2. 2916
  3. 4096
  4. 8281
  5. 2209
  6. 2601
  7. 1225
  8. 5625
  9. 8649
  10. 7744
  11. 1936
  12. 4489
  13. 5329
  14. 7921
  15. 3721
  16. 9025
  17. 3969
  18. 1024
  19. 4225
  20. 1521
  21. 1296
  22. 7569
  23. 6241
  24. 1764
  25. 3364
  26. 9801
  27. 2401
  28. 5776
  29. 1369
  30. 7225
  31. 2704
  32. 2116
  33. 1156
  34. 7056
  35. 6724
  36. 3249
  37. 4624
  38. 9604
  39. 5929
  40. 3136

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