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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 80 · 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. 1.81 × 9 =
  2. 2.49 × 99 =
  3. 3.237 × 9 =
  4. 4.245 × 999 =
  5. 5.2 × 9 =
  6. 6.206 × 9 =
  7. 7.124 × 999 =
  8. 8.7 × 9 =
  9. 9.358 × 999 =
  10. 10.12 × 9 =
  11. 11.608 × 999 =
  12. 12.8 × 9 =
  13. 13.9711 × 999 =
  14. 14.27 × 99 =
  15. 15.83 × 99 =
  16. 16.57 × 99 =
  17. 17.9128 × 999 =
  18. 18.7 × 9 =
  19. 19.2 × 9 =
  20. 20.91 × 99 =
  21. 21.225 × 999 =
  22. 22.3 × 9 =
  23. 23.519 × 999 =
  24. 24.677 × 999 =
  25. 25.3 × 9 =
  26. 26.268 × 9 =
  27. 27.96 × 99 =
  28. 28.48 × 99 =
  29. 29.33 × 99 =
  30. 30.2 × 9 =
  31. 31.609 × 999 =
  32. 32.7 × 9 =
  33. 33.694 × 99 =
  34. 34.2 × 9 =
  35. 35.332 × 999 =
  36. 36.3511 × 999 =
  37. 37.906 × 999 =
  38. 38.7 × 9 =
  39. 39.31 × 999 =
  40. 40.729 × 999 =

Answer key

  1. 729
  2. 4851
  3. 2133
  4. 244755
  5. 18
  6. 1854
  7. 123876
  8. 63
  9. 357642
  10. 108
  11. 607392
  12. 72
  13. 9701289
  14. 2673
  15. 8217
  16. 5643
  17. 9118872
  18. 63
  19. 18
  20. 9009
  21. 224775
  22. 27
  23. 518481
  24. 676323
  25. 27
  26. 2412
  27. 9504
  28. 4752
  29. 3267
  30. 18
  31. 608391
  32. 63
  33. 68706
  34. 18
  35. 331668
  36. 3507489
  37. 905094
  38. 63
  39. 30969
  40. 728271

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