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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 617 · 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. 1.91² =
  2. 2.56² =
  3. 3.45² =
  4. 4.66² =
  5. 5.69² =
  6. 6.37² =
  7. 7.41² =
  8. 8.89² =
  9. 9.62² =
  10. 10.67² =
  11. 11.51² =
  12. 12.53² =
  13. 13.33² =
  14. 14.71² =
  15. 15.93² =
  16. 16.31² =
  17. 17.87² =
  18. 18.35² =
  19. 19.78² =
  20. 20.73² =
  21. 21.32² =
  22. 22.92² =
  23. 23.81² =
  24. 24.85² =
  25. 25.61² =
  26. 26.47² =
  27. 27.42² =
  28. 28.49² =
  29. 29.39² =
  30. 30.59² =
  31. 31.65² =
  32. 32.54² =
  33. 33.82² =
  34. 34.52² =
  35. 35.86² =
  36. 36.75² =
  37. 37.36² =
  38. 38.84² =
  39. 39.83² =
  40. 40.74² =

Answer key

  1. 8281
  2. 3136
  3. 2025
  4. 4356
  5. 4761
  6. 1369
  7. 1681
  8. 7921
  9. 3844
  10. 4489
  11. 2601
  12. 2809
  13. 1089
  14. 5041
  15. 8649
  16. 961
  17. 7569
  18. 1225
  19. 6084
  20. 5329
  21. 1024
  22. 8464
  23. 6561
  24. 7225
  25. 3721
  26. 2209
  27. 1764
  28. 2401
  29. 1521
  30. 3481
  31. 4225
  32. 2916
  33. 6724
  34. 2704
  35. 7396
  36. 5625
  37. 1296
  38. 7056
  39. 6889
  40. 5476

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