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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 231 · 40 sums
TalentJR

The trick (Ekanyunena Purvena): Write the number with as many digits as there are nines (add zeros in front if needed). Left part: the number minus 1. Right part: “all from 9 and the last from 10” of the number. More digits than the nines (237 × 99)? Split off as many digits as there are nines (2 | 37): left = number − (front part + 1) = 234, right = complement of 37 = 63 → 23463.

NameDateTime takenScore ___ / 40
  1. 1.149 × 9 =
  2. 2.76 × 999 =
  3. 3.1889 × 999 =
  4. 4.1072 × 99 =
  5. 5.4 × 9 =
  6. 6.135 × 9 =
  7. 7.85 × 9 =
  8. 8.55 × 99 =
  9. 9.39 × 99 =
  10. 10.2 × 9 =
  11. 11.118 × 999 =
  12. 12.679 × 999 =
  13. 13.46 × 99 =
  14. 14.69 × 99 =
  15. 15.1123 × 99 =
  16. 16.2096 × 999 =
  17. 17.8 × 9 =
  18. 18.2528 × 99 =
  19. 19.97 × 99 =
  20. 20.37 × 99 =
  21. 21.21 × 99 =
  22. 22.5 × 9 =
  23. 23.37 × 9 =
  24. 24.95 × 999 =
  25. 25.243 × 999 =
  26. 26.23 × 99 =
  27. 27.71 × 99 =
  28. 28.76 × 99 =
  29. 29.1229 × 99 =
  30. 30.8 × 9 =
  31. 31.359 × 999 =
  32. 32.61 × 99 =
  33. 33.2 × 9 =
  34. 34.8 × 9 =
  35. 35.47 × 999 =
  36. 36.86 × 99 =
  37. 37.47 × 99 =
  38. 38.4 × 9 =
  39. 39.17059 × 999 =
  40. 40.27 × 999 =

Answer key

  1. 1341
  2. 75924
  3. 1887111
  4. 106128
  5. 36
  6. 1215
  7. 765
  8. 5445
  9. 3861
  10. 18
  11. 117882
  12. 678321
  13. 4554
  14. 6831
  15. 111177
  16. 2093904
  17. 72
  18. 250272
  19. 9603
  20. 3663
  21. 2079
  22. 45
  23. 333
  24. 94905
  25. 242757
  26. 2277
  27. 7029
  28. 7524
  29. 121671
  30. 72
  31. 358641
  32. 6039
  33. 18
  34. 72
  35. 46953
  36. 8514
  37. 4653
  38. 36
  39. 17041941
  40. 26973

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