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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 357 · 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. 2.56² =
  3. 3.44² =
  4. 4.72² =
  5. 5.32² =
  6. 6.75² =
  7. 7.82² =
  8. 8.94² =
  9. 9.96² =
  10. 10.64² =
  11. 11.74² =
  12. 12.48² =
  13. 13.99² =
  14. 14.57² =
  15. 15.71² =
  16. 16.65² =
  17. 17.47² =
  18. 18.63² =
  19. 19.84² =
  20. 20.95² =
  21. 21.58² =
  22. 22.62² =
  23. 23.43² =
  24. 24.49² =
  25. 25.52² =
  26. 26.36² =
  27. 27.31² =
  28. 28.76² =
  29. 29.42² =
  30. 30.34² =
  31. 31.97² =
  32. 32.91² =
  33. 33.67² =
  34. 34.81² =
  35. 35.41² =
  36. 36.66² =
  37. 37.61² =
  38. 38.54² =
  39. 39.88² =
  40. 40.83² =

Answer key

  1. 7225
  2. 3136
  3. 1936
  4. 5184
  5. 1024
  6. 5625
  7. 6724
  8. 8836
  9. 9216
  10. 4096
  11. 5476
  12. 2304
  13. 9801
  14. 3249
  15. 5041
  16. 4225
  17. 2209
  18. 3969
  19. 7056
  20. 9025
  21. 3364
  22. 3844
  23. 1849
  24. 2401
  25. 2704
  26. 1296
  27. 961
  28. 5776
  29. 1764
  30. 1156
  31. 9409
  32. 8281
  33. 4489
  34. 6561
  35. 1681
  36. 4356
  37. 3721
  38. 2916
  39. 7744
  40. 6889

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