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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 187 · 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. 1.36² =
  2. 2.93² =
  3. 3.43² =
  4. 4.44² =
  5. 5.41² =
  6. 6.77² =
  7. 7.34² =
  8. 8.68² =
  9. 9.95² =
  10. 10.76² =
  11. 11.96² =
  12. 12.88² =
  13. 13.78² =
  14. 14.83² =
  15. 15.61² =
  16. 16.94² =
  17. 17.45² =
  18. 18.57² =
  19. 19.58² =
  20. 20.37² =
  21. 21.55² =
  22. 22.32² =
  23. 23.65² =
  24. 24.54² =
  25. 25.39² =
  26. 26.52² =
  27. 27.74² =
  28. 28.56² =
  29. 29.97² =
  30. 30.63² =
  31. 31.59² =
  32. 32.81² =
  33. 33.98² =
  34. 34.79² =
  35. 35.53² =
  36. 36.51² =
  37. 37.49² =
  38. 38.69² =
  39. 39.72² =
  40. 40.87² =

Answer key

  1. 1296
  2. 8649
  3. 1849
  4. 1936
  5. 1681
  6. 5929
  7. 1156
  8. 4624
  9. 9025
  10. 5776
  11. 9216
  12. 7744
  13. 6084
  14. 6889
  15. 3721
  16. 8836
  17. 2025
  18. 3249
  19. 3364
  20. 1369
  21. 3025
  22. 1024
  23. 4225
  24. 2916
  25. 1521
  26. 2704
  27. 5476
  28. 3136
  29. 9409
  30. 3969
  31. 3481
  32. 6561
  33. 9604
  34. 6241
  35. 2809
  36. 2601
  37. 2401
  38. 4761
  39. 5184
  40. 7569

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