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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 640 · 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. 1.4 × 9 =
  2. 2.889 × 99 =
  3. 3.6896 × 999 =
  4. 4.4 × 9 =
  5. 5.7 × 99 =
  6. 6.2 × 999 =
  7. 7.2 × 9 =
  8. 8.71 × 99 =
  9. 9.151 × 999 =
  10. 10.218 × 999 =
  11. 11.49 × 99 =
  12. 12.715 × 999 =
  13. 13.6362 × 999 =
  14. 14.57 × 99 =
  15. 15.55 × 99 =
  16. 16.92 × 99 =
  17. 17.12925 × 999 =
  18. 18.11 × 99 =
  19. 19.56 × 9 =
  20. 20.33 × 99 =
  21. 21.5 × 9 =
  22. 22.69 × 9 =
  23. 23.2 × 9 =
  24. 24.3 × 9 =
  25. 25.5 × 9 =
  26. 26.17 × 99 =
  27. 27.12 × 99 =
  28. 28.4 × 9 =
  29. 29.53 × 99 =
  30. 30.51 × 99 =
  31. 31.5 × 9 =
  32. 32.95 × 99 =
  33. 33.331 × 999 =
  34. 34.4 × 9 =
  35. 35.2 × 9 =
  36. 36.1936 × 99 =
  37. 37.181 × 9 =
  38. 38.2 × 9 =
  39. 39.95 × 99 =
  40. 40.3 × 9 =

Answer key

  1. 36
  2. 88011
  3. 6889104
  4. 36
  5. 693
  6. 1998
  7. 18
  8. 7029
  9. 150849
  10. 217782
  11. 4851
  12. 714285
  13. 6355638
  14. 5643
  15. 5445
  16. 9108
  17. 12912075
  18. 1089
  19. 504
  20. 3267
  21. 45
  22. 621
  23. 18
  24. 27
  25. 45
  26. 1683
  27. 1188
  28. 36
  29. 5247
  30. 5049
  31. 45
  32. 9405
  33. 330669
  34. 36
  35. 18
  36. 191664
  37. 1629
  38. 18
  39. 9405
  40. 27

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