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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 883 · 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. 2.181 × 9 =
  3. 3.41 × 99 =
  4. 4.1185 × 99 =
  5. 5.5 × 9 =
  6. 6.16 × 999 =
  7. 7.703 × 999 =
  8. 8.9 × 99 =
  9. 9.22 × 99 =
  10. 10.5 × 9 =
  11. 11.11 × 99 =
  12. 12.3 × 9 =
  13. 13.2081 × 99 =
  14. 14.3 × 9 =
  15. 15.6 × 9 =
  16. 16.247 × 9 =
  17. 17.6 × 9 =
  18. 18.221 × 99 =
  19. 19.183 × 999 =
  20. 20.3 × 9 =
  21. 21.89 × 99 =
  22. 22.2 × 9 =
  23. 23.226 × 9 =
  24. 24.27 × 99 =
  25. 25.1505 × 99 =
  26. 26.3116 × 999 =
  27. 27.37 × 99 =
  28. 28.2351 × 99 =
  29. 29.5 × 9 =
  30. 30.49 × 99 =
  31. 31.425 × 999 =
  32. 32.3 × 9 =
  33. 33.8 × 9 =
  34. 34.14585 × 999 =
  35. 35.1954 × 99 =
  36. 36.5 × 9 =
  37. 37.73 × 9 =
  38. 38.52 × 99 =
  39. 39.8 × 9 =
  40. 40.39 × 99 =

Answer key

  1. 27
  2. 1629
  3. 4059
  4. 117315
  5. 45
  6. 15984
  7. 702297
  8. 891
  9. 2178
  10. 45
  11. 1089
  12. 27
  13. 206019
  14. 27
  15. 54
  16. 2223
  17. 54
  18. 21879
  19. 182817
  20. 27
  21. 8811
  22. 18
  23. 2034
  24. 2673
  25. 148995
  26. 3112884
  27. 3663
  28. 232749
  29. 45
  30. 4851
  31. 424575
  32. 27
  33. 72
  34. 14570415
  35. 193446
  36. 45
  37. 657
  38. 5148
  39. 72
  40. 3861

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