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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 733 · 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. 1.76² =
  2. 2.72² =
  3. 3.37² =
  4. 4.95² =
  5. 5.41² =
  6. 6.86² =
  7. 7.71² =
  8. 8.58² =
  9. 9.65² =
  10. 10.94² =
  11. 11.77² =
  12. 12.74² =
  13. 13.98² =
  14. 14.93² =
  15. 15.36² =
  16. 16.85² =
  17. 17.96² =
  18. 18.39² =
  19. 19.55² =
  20. 20.56² =
  21. 21.34² =
  22. 22.81² =
  23. 23.57² =
  24. 24.91² =
  25. 25.89² =
  26. 26.62² =
  27. 27.63² =
  28. 28.45² =
  29. 29.73² =
  30. 30.79² =
  31. 31.59² =
  32. 32.53² =
  33. 33.83² =
  34. 34.35² =
  35. 35.82² =
  36. 36.54² =
  37. 37.33² =
  38. 38.42² =
  39. 39.38² =
  40. 40.92² =

Answer key

  1. 5776
  2. 5184
  3. 1369
  4. 9025
  5. 1681
  6. 7396
  7. 5041
  8. 3364
  9. 4225
  10. 8836
  11. 5929
  12. 5476
  13. 9604
  14. 8649
  15. 1296
  16. 7225
  17. 9216
  18. 1521
  19. 3025
  20. 3136
  21. 1156
  22. 6561
  23. 3249
  24. 8281
  25. 7921
  26. 3844
  27. 3969
  28. 2025
  29. 5329
  30. 6241
  31. 3481
  32. 2809
  33. 6889
  34. 1225
  35. 6724
  36. 2916
  37. 1089
  38. 1764
  39. 1444
  40. 8464

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