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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 514 · 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. 1.87² =
  2. 2.94² =
  3. 3.35² =
  4. 4.66² =
  5. 5.92² =
  6. 6.88² =
  7. 7.57² =
  8. 8.32² =
  9. 9.79² =
  10. 10.67² =
  11. 11.53² =
  12. 12.58² =
  13. 13.93² =
  14. 14.43² =
  15. 15.34² =
  16. 16.96² =
  17. 17.81² =
  18. 18.61² =
  19. 19.52² =
  20. 20.41² =
  21. 21.63² =
  22. 22.47² =
  23. 23.56² =
  24. 24.51² =
  25. 25.68² =
  26. 26.85² =
  27. 27.69² =
  28. 28.49² =
  29. 29.82² =
  30. 30.31² =
  31. 31.46² =
  32. 32.91² =
  33. 33.74² =
  34. 34.45² =
  35. 35.55² =
  36. 36.44² =
  37. 37.95² =
  38. 38.42² =
  39. 39.97² =
  40. 40.38² =

Answer key

  1. 7569
  2. 8836
  3. 1225
  4. 4356
  5. 8464
  6. 7744
  7. 3249
  8. 1024
  9. 6241
  10. 4489
  11. 2809
  12. 3364
  13. 8649
  14. 1849
  15. 1156
  16. 9216
  17. 6561
  18. 3721
  19. 2704
  20. 1681
  21. 3969
  22. 2209
  23. 3136
  24. 2601
  25. 4624
  26. 7225
  27. 4761
  28. 2401
  29. 6724
  30. 961
  31. 2116
  32. 8281
  33. 5476
  34. 2025
  35. 3025
  36. 1936
  37. 9025
  38. 1764
  39. 9409
  40. 1444

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