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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 594 · 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. 1.64² =
  2. 2.84² =
  3. 3.47² =
  4. 4.51² =
  5. 5.75² =
  6. 6.44² =
  7. 7.82² =
  8. 8.67² =
  9. 9.97² =
  10. 10.76² =
  11. 11.88² =
  12. 12.35² =
  13. 13.91² =
  14. 14.32² =
  15. 15.54² =
  16. 16.45² =
  17. 17.56² =
  18. 18.73² =
  19. 19.31² =
  20. 20.43² =
  21. 21.39² =
  22. 22.83² =
  23. 23.71² =
  24. 24.98² =
  25. 25.87² =
  26. 26.37² =
  27. 27.94² =
  28. 28.52² =
  29. 29.59² =
  30. 30.63² =
  31. 31.36² =
  32. 32.49² =
  33. 33.46² =
  34. 34.78² =
  35. 35.92² =
  36. 36.72² =
  37. 37.93² =
  38. 38.41² =
  39. 39.34² =
  40. 40.53² =

Answer key

  1. 4096
  2. 7056
  3. 2209
  4. 2601
  5. 5625
  6. 1936
  7. 6724
  8. 4489
  9. 9409
  10. 5776
  11. 7744
  12. 1225
  13. 8281
  14. 1024
  15. 2916
  16. 2025
  17. 3136
  18. 5329
  19. 961
  20. 1849
  21. 1521
  22. 6889
  23. 5041
  24. 9604
  25. 7569
  26. 1369
  27. 8836
  28. 2704
  29. 3481
  30. 3969
  31. 1296
  32. 2401
  33. 2116
  34. 6084
  35. 8464
  36. 5184
  37. 8649
  38. 1681
  39. 1156
  40. 2809

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