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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 600 · 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. 1.27 × 9 =
  2. 2.78 × 99 =
  3. 3.437 × 999 =
  4. 4.16 × 99 =
  5. 5.8 × 9 =
  6. 6.695 × 999 =
  7. 7.225 × 9 =
  8. 8.354 × 999 =
  9. 9.721 × 999 =
  10. 10.12856 × 999 =
  11. 11.4 × 9 =
  12. 12.492 × 999 =
  13. 13.3 × 9 =
  14. 14.86 × 99 =
  15. 15.176 × 999 =
  16. 16.4 × 9 =
  17. 17.4 × 9 =
  18. 18.2113 × 99 =
  19. 19.51 × 999 =
  20. 20.221 × 999 =
  21. 21.21987 × 999 =
  22. 22.1543 × 99 =
  23. 23.1445 × 99 =
  24. 24.62 × 99 =
  25. 25.26693 × 999 =
  26. 26.72 × 99 =
  27. 27.2078 × 999 =
  28. 28.731 × 99 =
  29. 29.7 × 9 =
  30. 30.13 × 99 =
  31. 31.3 × 99 =
  32. 32.8 × 99 =
  33. 33.2 × 9 =
  34. 34.21 × 99 =
  35. 35.23 × 999 =
  36. 36.9 × 99 =
  37. 37.5 × 9 =
  38. 38.47 × 99 =
  39. 39.13409 × 999 =
  40. 40.8 × 9 =

Answer key

  1. 243
  2. 7722
  3. 436563
  4. 1584
  5. 72
  6. 694305
  7. 2025
  8. 353646
  9. 720279
  10. 12843144
  11. 36
  12. 491508
  13. 27
  14. 8514
  15. 175824
  16. 36
  17. 36
  18. 209187
  19. 50949
  20. 220779
  21. 21965013
  22. 152757
  23. 143055
  24. 6138
  25. 26666307
  26. 7128
  27. 2075922
  28. 72369
  29. 63
  30. 1287
  31. 297
  32. 792
  33. 18
  34. 2079
  35. 22977
  36. 891
  37. 45
  38. 4653
  39. 13395591
  40. 72

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