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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 799 · 40 sums
TalentJR

The trick (Dwandwa Yoga): For abc: columns D(a) | D(ab) | D(abc) | D(bc) | D(c). D(a) = a², D(ab) = 2ab, D(abc) = 2ac + b², D(abcd) = 2ad + 2bc. Combine from the right with carries.

NameDateTime takenScore ___ / 40
  1. 1.699² =
  2. 2.319² =
  3. 3.507² =
  4. 4.7469² =
  5. 5.140² =
  6. 6.9400² =
  7. 7.6225² =
  8. 8.533² =
  9. 9.980² =
  10. 10.690² =
  11. 11.3239² =
  12. 12.794² =
  13. 13.836² =
  14. 14.250² =
  15. 15.801² =
  16. 16.7612² =
  17. 17.675² =
  18. 18.932² =
  19. 19.554² =
  20. 20.192² =
  21. 21.107² =
  22. 22.308² =
  23. 23.329² =
  24. 24.366² =
  25. 25.205² =
  26. 26.5125² =
  27. 27.502² =
  28. 28.1865² =
  29. 29.150² =
  30. 30.888² =
  31. 31.119² =
  32. 32.908² =
  33. 33.6945² =
  34. 34.976² =
  35. 35.199² =
  36. 36.897² =
  37. 37.129² =
  38. 38.714² =
  39. 39.290² =
  40. 40.236² =

Answer key

  1. 488601
  2. 101761
  3. 257049
  4. 55785961
  5. 19600
  6. 88360000
  7. 38750625
  8. 284089
  9. 960400
  10. 476100
  11. 10491121
  12. 630436
  13. 698896
  14. 62500
  15. 641601
  16. 57942544
  17. 455625
  18. 868624
  19. 306916
  20. 36864
  21. 11449
  22. 94864
  23. 108241
  24. 133956
  25. 42025
  26. 26265625
  27. 252004
  28. 3478225
  29. 22500
  30. 788544
  31. 14161
  32. 824464
  33. 48233025
  34. 952576
  35. 39601
  36. 804609
  37. 16641
  38. 509796
  39. 84100
  40. 55696

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