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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 598 · 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. 1.8 × 9 =
  2. 2.3 × 9 =
  3. 3.7 × 9 =
  4. 4.63 × 99 =
  5. 5.264 × 9 =
  6. 6.203 × 9 =
  7. 7.25 × 99 =
  8. 8.55 × 99 =
  9. 9.383 × 999 =
  10. 10.935 × 999 =
  11. 11.828 × 999 =
  12. 12.319 × 999 =
  13. 13.31 × 99 =
  14. 14.207 × 999 =
  15. 15.7 × 9 =
  16. 16.7 × 99 =
  17. 17.12 × 99 =
  18. 18.2 × 9 =
  19. 19.64 × 99 =
  20. 20.3 × 9 =
  21. 21.5 × 9 =
  22. 22.5 × 9 =
  23. 23.20119 × 999 =
  24. 24.84 × 99 =
  25. 25.5 × 9 =
  26. 26.57 × 999 =
  27. 27.368 × 99 =
  28. 28.46 × 99 =
  29. 29.46 × 9 =
  30. 30.3 × 9 =
  31. 31.8 × 99 =
  32. 32.3 × 9 =
  33. 33.699 × 999 =
  34. 34.5 × 9 =
  35. 35.6 × 9 =
  36. 36.468 × 999 =
  37. 37.12382 × 999 =
  38. 38.868 × 999 =
  39. 39.1153 × 99 =
  40. 40.723 × 999 =

Answer key

  1. 72
  2. 27
  3. 63
  4. 6237
  5. 2376
  6. 1827
  7. 2475
  8. 5445
  9. 382617
  10. 934065
  11. 827172
  12. 318681
  13. 3069
  14. 206793
  15. 63
  16. 693
  17. 1188
  18. 18
  19. 6336
  20. 27
  21. 45
  22. 45
  23. 20098881
  24. 8316
  25. 45
  26. 56943
  27. 36432
  28. 4554
  29. 414
  30. 27
  31. 792
  32. 27
  33. 698301
  34. 45
  35. 54
  36. 467532
  37. 12369618
  38. 867132
  39. 114147
  40. 722277

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