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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 86 · 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. 1.52² =
  2. 2.49² =
  3. 3.96² =
  4. 4.69² =
  5. 5.33² =
  6. 6.46² =
  7. 7.62² =
  8. 8.81² =
  9. 9.84² =
  10. 10.79² =
  11. 11.74² =
  12. 12.76² =
  13. 13.51² =
  14. 14.68² =
  15. 15.41² =
  16. 16.31² =
  17. 17.45² =
  18. 18.34² =
  19. 19.37² =
  20. 20.54² =
  21. 21.91² =
  22. 22.82² =
  23. 23.93² =
  24. 24.36² =
  25. 25.57² =
  26. 26.67² =
  27. 27.35² =
  28. 28.65² =
  29. 29.71² =
  30. 30.39² =
  31. 31.83² =
  32. 32.58² =
  33. 33.61² =
  34. 34.53² =
  35. 35.88² =
  36. 36.63² =
  37. 37.77² =
  38. 38.98² =
  39. 39.97² =
  40. 40.59² =

Answer key

  1. 2704
  2. 2401
  3. 9216
  4. 4761
  5. 1089
  6. 2116
  7. 3844
  8. 6561
  9. 7056
  10. 6241
  11. 5476
  12. 5776
  13. 2601
  14. 4624
  15. 1681
  16. 961
  17. 2025
  18. 1156
  19. 1369
  20. 2916
  21. 8281
  22. 6724
  23. 8649
  24. 1296
  25. 3249
  26. 4489
  27. 1225
  28. 4225
  29. 5041
  30. 1521
  31. 6889
  32. 3364
  33. 3721
  34. 2809
  35. 7744
  36. 3969
  37. 5929
  38. 9604
  39. 9409
  40. 3481

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