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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 419 · 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. 1.94² =
  2. 2.81² =
  3. 3.85² =
  4. 4.71² =
  5. 5.59² =
  6. 6.78² =
  7. 7.52² =
  8. 8.68² =
  9. 9.41² =
  10. 10.46² =
  11. 11.97² =
  12. 12.33² =
  13. 13.96² =
  14. 14.39² =
  15. 15.56² =
  16. 16.61² =
  17. 17.73² =
  18. 18.32² =
  19. 19.83² =
  20. 20.87² =
  21. 21.43² =
  22. 22.44² =
  23. 23.31² =
  24. 24.77² =
  25. 25.42² =
  26. 26.98² =
  27. 27.45² =
  28. 28.74² =
  29. 29.53² =
  30. 30.79² =
  31. 31.66² =
  32. 32.95² =
  33. 33.75² =
  34. 34.36² =
  35. 35.38² =
  36. 36.51² =
  37. 37.34² =
  38. 38.93² =
  39. 39.92² =
  40. 40.63² =

Answer key

  1. 8836
  2. 6561
  3. 7225
  4. 5041
  5. 3481
  6. 6084
  7. 2704
  8. 4624
  9. 1681
  10. 2116
  11. 9409
  12. 1089
  13. 9216
  14. 1521
  15. 3136
  16. 3721
  17. 5329
  18. 1024
  19. 6889
  20. 7569
  21. 1849
  22. 1936
  23. 961
  24. 5929
  25. 1764
  26. 9604
  27. 2025
  28. 5476
  29. 2809
  30. 6241
  31. 4356
  32. 9025
  33. 5625
  34. 1296
  35. 1444
  36. 2601
  37. 1156
  38. 8649
  39. 8464
  40. 3969

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