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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 116 · 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. 1.66² =
  2. 2.32² =
  3. 3.91² =
  4. 4.51² =
  5. 5.35² =
  6. 6.52² =
  7. 7.61² =
  8. 8.63² =
  9. 9.53² =
  10. 10.34² =
  11. 11.95² =
  12. 12.69² =
  13. 13.45² =
  14. 14.77² =
  15. 15.94² =
  16. 16.58² =
  17. 17.59² =
  18. 18.78² =
  19. 19.89² =
  20. 20.81² =
  21. 21.86² =
  22. 22.84² =
  23. 23.36² =
  24. 24.92² =
  25. 25.42² =
  26. 26.67² =
  27. 27.72² =
  28. 28.54² =
  29. 29.44² =
  30. 30.41² =
  31. 31.83² =
  32. 32.98² =
  33. 33.37² =
  34. 34.75² =
  35. 35.47² =
  36. 36.39² =
  37. 37.57² =
  38. 38.71² =
  39. 39.93² =
  40. 40.65² =

Answer key

  1. 4356
  2. 1024
  3. 8281
  4. 2601
  5. 1225
  6. 2704
  7. 3721
  8. 3969
  9. 2809
  10. 1156
  11. 9025
  12. 4761
  13. 2025
  14. 5929
  15. 8836
  16. 3364
  17. 3481
  18. 6084
  19. 7921
  20. 6561
  21. 7396
  22. 7056
  23. 1296
  24. 8464
  25. 1764
  26. 4489
  27. 5184
  28. 2916
  29. 1936
  30. 1681
  31. 6889
  32. 9604
  33. 1369
  34. 5625
  35. 2209
  36. 1521
  37. 3249
  38. 5041
  39. 8649
  40. 4225

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