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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 963 · 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. 1.96² =
  2. 2.62² =
  3. 3.52² =
  4. 4.45² =
  5. 5.69² =
  6. 6.81² =
  7. 7.36² =
  8. 8.88² =
  9. 9.99² =
  10. 10.43² =
  11. 11.85² =
  12. 12.86² =
  13. 13.31² =
  14. 14.87² =
  15. 15.77² =
  16. 16.95² =
  17. 17.92² =
  18. 18.49² =
  19. 19.74² =
  20. 20.47² =
  21. 21.42² =
  22. 22.54² =
  23. 23.83² =
  24. 24.67² =
  25. 25.93² =
  26. 26.53² =
  27. 27.63² =
  28. 28.65² =
  29. 29.66² =
  30. 30.94² =
  31. 31.64² =
  32. 32.89² =
  33. 33.71² =
  34. 34.91² =
  35. 35.68² =
  36. 36.58² =
  37. 37.78² =
  38. 38.38² =
  39. 39.97² =
  40. 40.44² =

Answer key

  1. 9216
  2. 3844
  3. 2704
  4. 2025
  5. 4761
  6. 6561
  7. 1296
  8. 7744
  9. 9801
  10. 1849
  11. 7225
  12. 7396
  13. 961
  14. 7569
  15. 5929
  16. 9025
  17. 8464
  18. 2401
  19. 5476
  20. 2209
  21. 1764
  22. 2916
  23. 6889
  24. 4489
  25. 8649
  26. 2809
  27. 3969
  28. 4225
  29. 4356
  30. 8836
  31. 4096
  32. 7921
  33. 5041
  34. 8281
  35. 4624
  36. 3364
  37. 6084
  38. 1444
  39. 9409
  40. 1936

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