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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 230 · 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. 2.7 × 9 =
  3. 3.3 × 9 =
  4. 4.53 × 99 =
  5. 5.969 × 999 =
  6. 6.8 × 9 =
  7. 7.2 × 9 =
  8. 8.79 × 99 =
  9. 9.89 × 99 =
  10. 10.3 × 9 =
  11. 11.2743 × 99 =
  12. 12.13509 × 999 =
  13. 13.6 × 9 =
  14. 14.54 × 99 =
  15. 15.111 × 9 =
  16. 16.2302 × 99 =
  17. 17.21 × 99 =
  18. 18.546 × 999 =
  19. 19.11 × 99 =
  20. 20.5 × 9 =
  21. 21.8 × 9 =
  22. 22.18142 × 999 =
  23. 23.38 × 99 =
  24. 24.26201 × 999 =
  25. 25.2558 × 99 =
  26. 26.265 × 99 =
  27. 27.22291 × 999 =
  28. 28.5 × 9 =
  29. 29.5 × 99 =
  30. 30.16 × 99 =
  31. 31.8 × 9 =
  32. 32.7 × 9 =
  33. 33.343 × 999 =
  34. 34.8 × 9 =
  35. 35.198 × 999 =
  36. 36.3 × 9 =
  37. 37.5 × 999 =
  38. 38.3 × 9 =
  39. 39.46 × 99 =
  40. 40.87 × 99 =

Answer key

  1. 18
  2. 63
  3. 27
  4. 5247
  5. 968031
  6. 72
  7. 18
  8. 7821
  9. 8811
  10. 27
  11. 271557
  12. 13495491
  13. 54
  14. 5346
  15. 999
  16. 227898
  17. 2079
  18. 545454
  19. 1089
  20. 45
  21. 72
  22. 18123858
  23. 3762
  24. 26174799
  25. 253242
  26. 26235
  27. 22268709
  28. 45
  29. 495
  30. 1584
  31. 72
  32. 63
  33. 342657
  34. 72
  35. 197802
  36. 27
  37. 4995
  38. 27
  39. 4554
  40. 8613

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