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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 960 · 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. 1.37² =
  2. 2.82² =
  3. 3.99² =
  4. 4.72² =
  5. 5.51² =
  6. 6.39² =
  7. 7.41² =
  8. 8.65² =
  9. 9.76² =
  10. 10.92² =
  11. 11.98² =
  12. 12.52² =
  13. 13.81² =
  14. 14.42² =
  15. 15.77² =
  16. 16.68² =
  17. 17.83² =
  18. 18.59² =
  19. 19.61² =
  20. 20.32² =
  21. 21.36² =
  22. 22.34² =
  23. 23.54² =
  24. 24.87² =
  25. 25.58² =
  26. 26.43² =
  27. 27.64² =
  28. 28.33² =
  29. 29.89² =
  30. 30.66² =
  31. 31.62² =
  32. 32.71² =
  33. 33.73² =
  34. 34.46² =
  35. 35.93² =
  36. 36.88² =
  37. 37.86² =
  38. 38.56² =
  39. 39.47² =
  40. 40.55² =

Answer key

  1. 1369
  2. 6724
  3. 9801
  4. 5184
  5. 2601
  6. 1521
  7. 1681
  8. 4225
  9. 5776
  10. 8464
  11. 9604
  12. 2704
  13. 6561
  14. 1764
  15. 5929
  16. 4624
  17. 6889
  18. 3481
  19. 3721
  20. 1024
  21. 1296
  22. 1156
  23. 2916
  24. 7569
  25. 3364
  26. 1849
  27. 4096
  28. 1089
  29. 7921
  30. 4356
  31. 3844
  32. 5041
  33. 5329
  34. 2116
  35. 8649
  36. 7744
  37. 7396
  38. 3136
  39. 2209
  40. 3025

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