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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 607 · 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. 1.3 × 9 =
  2. 2.657 × 999 =
  3. 3.1413 × 99 =
  4. 4.11 × 99 =
  5. 5.9 × 99 =
  6. 6.385 × 99 =
  7. 7.7 × 9 =
  8. 8.3 × 9 =
  9. 9.42 × 99 =
  10. 10.14418 × 999 =
  11. 11.268 × 999 =
  12. 12.145 × 9 =
  13. 13.29 × 99 =
  14. 14.8 × 99 =
  15. 15.124 × 9 =
  16. 16.61 × 9 =
  17. 17.2123 × 99 =
  18. 18.16 × 99 =
  19. 19.204 × 9 =
  20. 20.159 × 999 =
  21. 21.2 × 9 =
  22. 22.931 × 999 =
  23. 23.134 × 9 =
  24. 24.576 × 999 =
  25. 25.751 × 999 =
  26. 26.7 × 9 =
  27. 27.7 × 9 =
  28. 28.7 × 9 =
  29. 29.21915 × 999 =
  30. 30.25 × 99 =
  31. 31.5 × 99 =
  32. 32.5 × 9 =
  33. 33.62 × 9 =
  34. 34.2 × 9 =
  35. 35.296 × 999 =
  36. 36.259 × 999 =
  37. 37.8 × 9 =
  38. 38.11 × 99 =
  39. 39.2 × 9 =
  40. 40.126 × 999 =

Answer key

  1. 27
  2. 656343
  3. 139887
  4. 1089
  5. 891
  6. 38115
  7. 63
  8. 27
  9. 4158
  10. 14403582
  11. 267732
  12. 1305
  13. 2871
  14. 792
  15. 1116
  16. 549
  17. 210177
  18. 1584
  19. 1836
  20. 158841
  21. 18
  22. 930069
  23. 1206
  24. 575424
  25. 750249
  26. 63
  27. 63
  28. 63
  29. 21893085
  30. 2475
  31. 495
  32. 45
  33. 558
  34. 18
  35. 295704
  36. 258741
  37. 72
  38. 1089
  39. 18
  40. 125874

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