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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 634 · 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. 1.95 × 99 =
  2. 2.19688 × 999 =
  3. 3.18421 × 999 =
  4. 4.348 × 999 =
  5. 5.5 × 9 =
  6. 6.15732 × 999 =
  7. 7.3 × 9 =
  8. 8.171 × 999 =
  9. 9.39 × 99 =
  10. 10.7 × 9 =
  11. 11.7391 × 999 =
  12. 12.172 × 9 =
  13. 13.11704 × 999 =
  14. 14.11 × 99 =
  15. 15.3 × 9 =
  16. 16.26913 × 999 =
  17. 17.89 × 99 =
  18. 18.28 × 99 =
  19. 19.3 × 99 =
  20. 20.41 × 999 =
  21. 21.4 × 9 =
  22. 22.8 × 9 =
  23. 23.5 × 9 =
  24. 24.6 × 9 =
  25. 25.891 × 999 =
  26. 26.2871 × 99 =
  27. 27.3874 × 999 =
  28. 28.194 × 9 =
  29. 29.3 × 9 =
  30. 30.4 × 9 =
  31. 31.904 × 99 =
  32. 32.2 × 9 =
  33. 33.7 × 9 =
  34. 34.236 × 9 =
  35. 35.31 × 99 =
  36. 36.114 × 999 =
  37. 37.27 × 999 =
  38. 38.5 × 9 =
  39. 39.476 × 999 =
  40. 40.2 × 9 =

Answer key

  1. 9405
  2. 19668312
  3. 18402579
  4. 347652
  5. 45
  6. 15716268
  7. 27
  8. 170829
  9. 3861
  10. 63
  11. 7383609
  12. 1548
  13. 11692296
  14. 1089
  15. 27
  16. 26886087
  17. 8811
  18. 2772
  19. 297
  20. 40959
  21. 36
  22. 72
  23. 45
  24. 54
  25. 890109
  26. 284229
  27. 3870126
  28. 1746
  29. 27
  30. 36
  31. 89496
  32. 18
  33. 63
  34. 2124
  35. 3069
  36. 113886
  37. 26973
  38. 45
  39. 475524
  40. 18

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