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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 241 · 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. 1.37² =
  2. 2.62² =
  3. 3.64² =
  4. 4.36² =
  5. 5.51² =
  6. 6.42² =
  7. 7.96² =
  8. 8.69² =
  9. 9.83² =
  10. 10.68² =
  11. 11.94² =
  12. 12.86² =
  13. 13.91² =
  14. 14.55² =
  15. 15.63² =
  16. 16.48² =
  17. 17.75² =
  18. 18.35² =
  19. 19.76² =
  20. 20.95² =
  21. 21.46² =
  22. 22.61² =
  23. 23.74² =
  24. 24.53² =
  25. 25.31² =
  26. 26.85² =
  27. 27.93² =
  28. 28.41² =
  29. 29.34² =
  30. 30.32² =
  31. 31.89² =
  32. 32.97² =
  33. 33.57² =
  34. 34.52² =
  35. 35.82² =
  36. 36.33² =
  37. 37.47² =
  38. 38.81² =
  39. 39.87² =
  40. 40.49² =

Answer key

  1. 1369
  2. 3844
  3. 4096
  4. 1296
  5. 2601
  6. 1764
  7. 9216
  8. 4761
  9. 6889
  10. 4624
  11. 8836
  12. 7396
  13. 8281
  14. 3025
  15. 3969
  16. 2304
  17. 5625
  18. 1225
  19. 5776
  20. 9025
  21. 2116
  22. 3721
  23. 5476
  24. 2809
  25. 961
  26. 7225
  27. 8649
  28. 1681
  29. 1156
  30. 1024
  31. 7921
  32. 9409
  33. 3249
  34. 2704
  35. 6724
  36. 1089
  37. 2209
  38. 6561
  39. 7569
  40. 2401

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