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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 927 · 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. 1.41 × 99 =
  2. 2.7 × 9 =
  3. 3.8 × 9 =
  4. 4.59 × 99 =
  5. 5.15076 × 999 =
  6. 6.26 × 99 =
  7. 7.3 × 9 =
  8. 8.8 × 9 =
  9. 9.785 × 99 =
  10. 10.351 × 999 =
  11. 11.852 × 999 =
  12. 12.11 × 99 =
  13. 13.227 × 9 =
  14. 14.3 × 9 =
  15. 15.91 × 99 =
  16. 16.7 × 9 =
  17. 17.57 × 9 =
  18. 18.19 × 99 =
  19. 19.41 × 99 =
  20. 20.11 × 99 =
  21. 21.39 × 99 =
  22. 22.8 × 9 =
  23. 23.4 × 9 =
  24. 24.3 × 9 =
  25. 25.2069 × 99 =
  26. 26.1667 × 999 =
  27. 27.8 × 9 =
  28. 28.4 × 9 =
  29. 29.19 × 99 =
  30. 30.2931 × 99 =
  31. 31.14 × 99 =
  32. 32.191 × 9 =
  33. 33.2553 × 999 =
  34. 34.16643 × 999 =
  35. 35.555 × 999 =
  36. 36.21 × 99 =
  37. 37.37 × 99 =
  38. 38.8 × 9 =
  39. 39.4 × 9 =
  40. 40.3 × 9 =

Answer key

  1. 4059
  2. 63
  3. 72
  4. 5841
  5. 15060924
  6. 2574
  7. 27
  8. 72
  9. 77715
  10. 350649
  11. 851148
  12. 1089
  13. 2043
  14. 27
  15. 9009
  16. 63
  17. 513
  18. 1881
  19. 4059
  20. 1089
  21. 3861
  22. 72
  23. 36
  24. 27
  25. 204831
  26. 1665333
  27. 72
  28. 36
  29. 1881
  30. 290169
  31. 1386
  32. 1719
  33. 2550447
  34. 16626357
  35. 554445
  36. 2079
  37. 3663
  38. 72
  39. 36
  40. 27

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