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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 348 · 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. 1.31² =
  2. 2.92² =
  3. 3.91² =
  4. 4.38² =
  5. 5.42² =
  6. 6.48² =
  7. 7.36² =
  8. 8.83² =
  9. 9.33² =
  10. 10.32² =
  11. 11.87² =
  12. 12.63² =
  13. 13.53² =
  14. 14.94² =
  15. 15.64² =
  16. 16.81² =
  17. 17.52² =
  18. 18.47² =
  19. 19.61² =
  20. 20.72² =
  21. 21.51² =
  22. 22.54² =
  23. 23.39² =
  24. 24.44² =
  25. 25.41² =
  26. 26.73² =
  27. 27.67² =
  28. 28.34² =
  29. 29.71² =
  30. 30.76² =
  31. 31.35² =
  32. 32.74² =
  33. 33.59² =
  34. 34.57² =
  35. 35.68² =
  36. 36.49² =
  37. 37.93² =
  38. 38.88² =
  39. 39.65² =
  40. 40.85² =

Answer key

  1. 961
  2. 8464
  3. 8281
  4. 1444
  5. 1764
  6. 2304
  7. 1296
  8. 6889
  9. 1089
  10. 1024
  11. 7569
  12. 3969
  13. 2809
  14. 8836
  15. 4096
  16. 6561
  17. 2704
  18. 2209
  19. 3721
  20. 5184
  21. 2601
  22. 2916
  23. 1521
  24. 1936
  25. 1681
  26. 5329
  27. 4489
  28. 1156
  29. 5041
  30. 5776
  31. 1225
  32. 5476
  33. 3481
  34. 3249
  35. 4624
  36. 2401
  37. 8649
  38. 7744
  39. 4225
  40. 7225

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