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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 444 · 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. 1.74² =
  2. 2.73² =
  3. 3.79² =
  4. 4.65² =
  5. 5.59² =
  6. 6.83² =
  7. 7.37² =
  8. 8.91² =
  9. 9.75² =
  10. 10.44² =
  11. 11.41² =
  12. 12.88² =
  13. 13.72² =
  14. 14.87² =
  15. 15.71² =
  16. 16.97² =
  17. 17.32² =
  18. 18.35² =
  19. 19.61² =
  20. 20.49² =
  21. 21.48² =
  22. 22.51² =
  23. 23.85² =
  24. 24.95² =
  25. 25.42² =
  26. 26.64² =
  27. 27.63² =
  28. 28.47² =
  29. 29.54² =
  30. 30.93² =
  31. 31.69² =
  32. 32.81² =
  33. 33.52² =
  34. 34.55² =
  35. 35.96² =
  36. 36.58² =
  37. 37.68² =
  38. 38.67² =
  39. 39.53² =
  40. 40.34² =

Answer key

  1. 5476
  2. 5329
  3. 6241
  4. 4225
  5. 3481
  6. 6889
  7. 1369
  8. 8281
  9. 5625
  10. 1936
  11. 1681
  12. 7744
  13. 5184
  14. 7569
  15. 5041
  16. 9409
  17. 1024
  18. 1225
  19. 3721
  20. 2401
  21. 2304
  22. 2601
  23. 7225
  24. 9025
  25. 1764
  26. 4096
  27. 3969
  28. 2209
  29. 2916
  30. 8649
  31. 4761
  32. 6561
  33. 2704
  34. 3025
  35. 9216
  36. 3364
  37. 4624
  38. 4489
  39. 2809
  40. 1156

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