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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 793 · 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. 1.52² =
  2. 2.59² =
  3. 3.57² =
  4. 4.76² =
  5. 5.78² =
  6. 6.96² =
  7. 7.99² =
  8. 8.81² =
  9. 9.51² =
  10. 10.43² =
  11. 11.32² =
  12. 12.49² =
  13. 13.73² =
  14. 14.69² =
  15. 15.95² =
  16. 16.45² =
  17. 17.53² =
  18. 18.65² =
  19. 19.63² =
  20. 20.46² =
  21. 21.86² =
  22. 22.34² =
  23. 23.71² =
  24. 24.41² =
  25. 25.33² =
  26. 26.58² =
  27. 27.77² =
  28. 28.56² =
  29. 29.68² =
  30. 30.48² =
  31. 31.42² =
  32. 32.61² =
  33. 33.36² =
  34. 34.35² =
  35. 35.82² =
  36. 36.98² =
  37. 37.75² =
  38. 38.93² =
  39. 39.87² =
  40. 40.62² =

Answer key

  1. 2704
  2. 3481
  3. 3249
  4. 5776
  5. 6084
  6. 9216
  7. 9801
  8. 6561
  9. 2601
  10. 1849
  11. 1024
  12. 2401
  13. 5329
  14. 4761
  15. 9025
  16. 2025
  17. 2809
  18. 4225
  19. 3969
  20. 2116
  21. 7396
  22. 1156
  23. 5041
  24. 1681
  25. 1089
  26. 3364
  27. 5929
  28. 3136
  29. 4624
  30. 2304
  31. 1764
  32. 3721
  33. 1296
  34. 1225
  35. 6724
  36. 9604
  37. 5625
  38. 8649
  39. 7569
  40. 3844

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