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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 78 · 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. 1.35² =
  2. 2.92² =
  3. 3.98² =
  4. 4.91² =
  5. 5.78² =
  6. 6.66² =
  7. 7.48² =
  8. 8.51² =
  9. 9.53² =
  10. 10.33² =
  11. 11.45² =
  12. 12.61² =
  13. 13.73² =
  14. 14.31² =
  15. 15.54² =
  16. 16.59² =
  17. 17.39² =
  18. 18.43² =
  19. 19.77² =
  20. 20.62² =
  21. 21.64² =
  22. 22.81² =
  23. 23.75² =
  24. 24.41² =
  25. 25.65² =
  26. 26.52² =
  27. 27.46² =
  28. 28.32² =
  29. 29.38² =
  30. 30.63² =
  31. 31.56² =
  32. 32.94² =
  33. 33.87² =
  34. 34.85² =
  35. 35.82² =
  36. 36.42² =
  37. 37.58² =
  38. 38.86² =
  39. 39.99² =
  40. 40.97² =

Answer key

  1. 1225
  2. 8464
  3. 9604
  4. 8281
  5. 6084
  6. 4356
  7. 2304
  8. 2601
  9. 2809
  10. 1089
  11. 2025
  12. 3721
  13. 5329
  14. 961
  15. 2916
  16. 3481
  17. 1521
  18. 1849
  19. 5929
  20. 3844
  21. 4096
  22. 6561
  23. 5625
  24. 1681
  25. 4225
  26. 2704
  27. 2116
  28. 1024
  29. 1444
  30. 3969
  31. 3136
  32. 8836
  33. 7569
  34. 7225
  35. 6724
  36. 1764
  37. 3364
  38. 7396
  39. 9801
  40. 9409

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