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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 212 · 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. 1.2 × 9 =
  2. 2.4 × 9 =
  3. 3.753 × 999 =
  4. 4.166 × 9 =
  5. 5.11 × 99 =
  6. 6.221 × 9 =
  7. 7.179 × 99 =
  8. 8.4 × 9 =
  9. 9.79 × 99 =
  10. 10.8 × 9 =
  11. 11.2 × 9 =
  12. 12.815 × 999 =
  13. 13.36 × 99 =
  14. 14.767 × 999 =
  15. 15.2744 × 99 =
  16. 16.203 × 9 =
  17. 17.67 × 99 =
  18. 18.4 × 9 =
  19. 19.2 × 9 =
  20. 20.2 × 9 =
  21. 21.7 × 9 =
  22. 22.5 × 9 =
  23. 23.18 × 99 =
  24. 24.45 × 99 =
  25. 25.22 × 9 =
  26. 26.5 × 9 =
  27. 27.4 × 9 =
  28. 28.1063 × 99 =
  29. 29.618 × 999 =
  30. 30.13927 × 999 =
  31. 31.93 × 99 =
  32. 32.6 × 9 =
  33. 33.166 × 99 =
  34. 34.1154 × 999 =
  35. 35.447 × 999 =
  36. 36.12 × 99 =
  37. 37.5 × 9 =
  38. 38.552 × 999 =
  39. 39.3 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 18
  2. 36
  3. 752247
  4. 1494
  5. 1089
  6. 1989
  7. 17721
  8. 36
  9. 7821
  10. 72
  11. 18
  12. 814185
  13. 3564
  14. 766233
  15. 271656
  16. 1827
  17. 6633
  18. 36
  19. 18
  20. 18
  21. 63
  22. 45
  23. 1782
  24. 4455
  25. 198
  26. 45
  27. 36
  28. 105237
  29. 617382
  30. 13913073
  31. 9207
  32. 54
  33. 16434
  34. 1152846
  35. 446553
  36. 1188
  37. 45
  38. 551448
  39. 27
  40. 72

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