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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 813 · 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. 1.85² =
  2. 2.73² =
  3. 3.36² =
  4. 4.72² =
  5. 5.51² =
  6. 6.41² =
  7. 7.31² =
  8. 8.82² =
  9. 9.64² =
  10. 10.35² =
  11. 11.99² =
  12. 12.58² =
  13. 13.91² =
  14. 14.77² =
  15. 15.33² =
  16. 16.55² =
  17. 17.92² =
  18. 18.34² =
  19. 19.42² =
  20. 20.62² =
  21. 21.57² =
  22. 22.54² =
  23. 23.75² =
  24. 24.56² =
  25. 25.71² =
  26. 26.94² =
  27. 27.66² =
  28. 28.46² =
  29. 29.49² =
  30. 30.61² =
  31. 31.97² =
  32. 32.88² =
  33. 33.65² =
  34. 34.74² =
  35. 35.45² =
  36. 36.79² =
  37. 37.44² =
  38. 38.32² =
  39. 39.52² =
  40. 40.43² =

Answer key

  1. 7225
  2. 5329
  3. 1296
  4. 5184
  5. 2601
  6. 1681
  7. 961
  8. 6724
  9. 4096
  10. 1225
  11. 9801
  12. 3364
  13. 8281
  14. 5929
  15. 1089
  16. 3025
  17. 8464
  18. 1156
  19. 1764
  20. 3844
  21. 3249
  22. 2916
  23. 5625
  24. 3136
  25. 5041
  26. 8836
  27. 4356
  28. 2116
  29. 2401
  30. 3721
  31. 9409
  32. 7744
  33. 4225
  34. 5476
  35. 2025
  36. 6241
  37. 1936
  38. 1024
  39. 2704
  40. 1849

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