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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 706 · 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. 1.31² =
  2. 2.73² =
  3. 3.84² =
  4. 4.43² =
  5. 5.81² =
  6. 6.36² =
  7. 7.63² =
  8. 8.61² =
  9. 9.48² =
  10. 10.35² =
  11. 11.47² =
  12. 12.74² =
  13. 13.67² =
  14. 14.56² =
  15. 15.94² =
  16. 16.75² =
  17. 17.99² =
  18. 18.51² =
  19. 19.53² =
  20. 20.71² =
  21. 21.98² =
  22. 22.46² =
  23. 23.89² =
  24. 24.34² =
  25. 25.85² =
  26. 26.86² =
  27. 27.77² =
  28. 28.76² =
  29. 29.45² =
  30. 30.58² =
  31. 31.96² =
  32. 32.42² =
  33. 33.54² =
  34. 34.62² =
  35. 35.87² =
  36. 36.41² =
  37. 37.95² =
  38. 38.33² =
  39. 39.88² =
  40. 40.91² =

Answer key

  1. 961
  2. 5329
  3. 7056
  4. 1849
  5. 6561
  6. 1296
  7. 3969
  8. 3721
  9. 2304
  10. 1225
  11. 2209
  12. 5476
  13. 4489
  14. 3136
  15. 8836
  16. 5625
  17. 9801
  18. 2601
  19. 2809
  20. 5041
  21. 9604
  22. 2116
  23. 7921
  24. 1156
  25. 7225
  26. 7396
  27. 5929
  28. 5776
  29. 2025
  30. 3364
  31. 9216
  32. 1764
  33. 2916
  34. 3844
  35. 7569
  36. 1681
  37. 9025
  38. 1089
  39. 7744
  40. 8281

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