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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 746 · 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. 1.51² =
  2. 2.55² =
  3. 3.89² =
  4. 4.56² =
  5. 5.45² =
  6. 6.99² =
  7. 7.62² =
  8. 8.36² =
  9. 9.91² =
  10. 10.92² =
  11. 11.35² =
  12. 12.37² =
  13. 13.84² =
  14. 14.33² =
  15. 15.63² =
  16. 16.41² =
  17. 17.47² =
  18. 18.82² =
  19. 19.88² =
  20. 20.86² =
  21. 21.61² =
  22. 22.53² =
  23. 23.85² =
  24. 24.73² =
  25. 25.46² =
  26. 26.58² =
  27. 27.43² =
  28. 28.74² =
  29. 29.95² =
  30. 30.77² =
  31. 31.79² =
  32. 32.44² =
  33. 33.81² =
  34. 34.54² =
  35. 35.87² =
  36. 36.32² =
  37. 37.57² =
  38. 38.59² =
  39. 39.31² =
  40. 40.69² =

Answer key

  1. 2601
  2. 3025
  3. 7921
  4. 3136
  5. 2025
  6. 9801
  7. 3844
  8. 1296
  9. 8281
  10. 8464
  11. 1225
  12. 1369
  13. 7056
  14. 1089
  15. 3969
  16. 1681
  17. 2209
  18. 6724
  19. 7744
  20. 7396
  21. 3721
  22. 2809
  23. 7225
  24. 5329
  25. 2116
  26. 3364
  27. 1849
  28. 5476
  29. 9025
  30. 5929
  31. 6241
  32. 1936
  33. 6561
  34. 2916
  35. 7569
  36. 1024
  37. 3249
  38. 3481
  39. 961
  40. 4761

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