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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 698 · 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. 1.98² =
  2. 2.54² =
  3. 3.91² =
  4. 4.39² =
  5. 5.66² =
  6. 6.41² =
  7. 7.48² =
  8. 8.74² =
  9. 9.65² =
  10. 10.72² =
  11. 11.81² =
  12. 12.43² =
  13. 13.59² =
  14. 14.97² =
  15. 15.56² =
  16. 16.77² =
  17. 17.42² =
  18. 18.87² =
  19. 19.38² =
  20. 20.62² =
  21. 21.53² =
  22. 22.57² =
  23. 23.49² =
  24. 24.68² =
  25. 25.33² =
  26. 26.79² =
  27. 27.36² =
  28. 28.84² =
  29. 29.32² =
  30. 30.82² =
  31. 31.75² =
  32. 32.69² =
  33. 33.51² =
  34. 34.45² =
  35. 35.63² =
  36. 36.55² =
  37. 37.31² =
  38. 38.46² =
  39. 39.96² =
  40. 40.61² =

Answer key

  1. 9604
  2. 2916
  3. 8281
  4. 1521
  5. 4356
  6. 1681
  7. 2304
  8. 5476
  9. 4225
  10. 5184
  11. 6561
  12. 1849
  13. 3481
  14. 9409
  15. 3136
  16. 5929
  17. 1764
  18. 7569
  19. 1444
  20. 3844
  21. 2809
  22. 3249
  23. 2401
  24. 4624
  25. 1089
  26. 6241
  27. 1296
  28. 7056
  29. 1024
  30. 6724
  31. 5625
  32. 4761
  33. 2601
  34. 2025
  35. 3969
  36. 3025
  37. 961
  38. 2116
  39. 9216
  40. 3721

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