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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 972 · 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. 2.68² =
  3. 3.45² =
  4. 4.34² =
  5. 5.81² =
  6. 6.63² =
  7. 7.49² =
  8. 8.98² =
  9. 9.76² =
  10. 10.54² =
  11. 11.62² =
  12. 12.88² =
  13. 13.97² =
  14. 14.95² =
  15. 15.74² =
  16. 16.31² =
  17. 17.77² =
  18. 18.78² =
  19. 19.53² =
  20. 20.99² =
  21. 21.59² =
  22. 22.61² =
  23. 23.75² =
  24. 24.47² =
  25. 25.86² =
  26. 26.91² =
  27. 27.32² =
  28. 28.79² =
  29. 29.41² =
  30. 30.64² =
  31. 31.65² =
  32. 32.48² =
  33. 33.96² =
  34. 34.46² =
  35. 35.42² =
  36. 36.89² =
  37. 37.38² =
  38. 38.39² =
  39. 39.35² =
  40. 40.57² =

Answer key

  1. 7569
  2. 4624
  3. 2025
  4. 1156
  5. 6561
  6. 3969
  7. 2401
  8. 9604
  9. 5776
  10. 2916
  11. 3844
  12. 7744
  13. 9409
  14. 9025
  15. 5476
  16. 961
  17. 5929
  18. 6084
  19. 2809
  20. 9801
  21. 3481
  22. 3721
  23. 5625
  24. 2209
  25. 7396
  26. 8281
  27. 1024
  28. 6241
  29. 1681
  30. 4096
  31. 4225
  32. 2304
  33. 9216
  34. 2116
  35. 1764
  36. 7921
  37. 1444
  38. 1521
  39. 1225
  40. 3249

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