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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 750 · 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. 1.5 × 99 =
  2. 2.5 × 9 =
  3. 3.16 × 99 =
  4. 4.849 × 999 =
  5. 5.8 × 9 =
  6. 6.7 × 9 =
  7. 7.11546 × 999 =
  8. 8.1997 × 99 =
  9. 9.91 × 99 =
  10. 10.7 × 9 =
  11. 11.7 × 99 =
  12. 12.2 × 9 =
  13. 13.731 × 999 =
  14. 14.76 × 99 =
  15. 15.3 × 9 =
  16. 16.3 × 9 =
  17. 17.433 × 99 =
  18. 18.384 × 999 =
  19. 19.226 × 9 =
  20. 20.6 × 9 =
  21. 21.23312 × 999 =
  22. 22.8 × 9 =
  23. 23.5 × 9 =
  24. 24.431 × 999 =
  25. 25.3 × 9 =
  26. 26.216 × 999 =
  27. 27.93 × 999 =
  28. 28.2568 × 99 =
  29. 29.8 × 9 =
  30. 30.744 × 999 =
  31. 31.141 × 9 =
  32. 32.63 × 99 =
  33. 33.222 × 999 =
  34. 34.14016 × 999 =
  35. 35.571 × 999 =
  36. 36.4 × 99 =
  37. 37.86 × 99 =
  38. 38.65 × 99 =
  39. 39.12854 × 999 =
  40. 40.66 × 99 =

Answer key

  1. 495
  2. 45
  3. 1584
  4. 848151
  5. 72
  6. 63
  7. 11534454
  8. 197703
  9. 9009
  10. 63
  11. 693
  12. 18
  13. 730269
  14. 7524
  15. 27
  16. 27
  17. 42867
  18. 383616
  19. 2034
  20. 54
  21. 23288688
  22. 72
  23. 45
  24. 430569
  25. 27
  26. 215784
  27. 92907
  28. 254232
  29. 72
  30. 743256
  31. 1269
  32. 6237
  33. 221778
  34. 14001984
  35. 570429
  36. 396
  37. 8514
  38. 6435
  39. 12841146
  40. 6534

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