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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 218 · 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. 1.166 × 999 =
  2. 2.2 × 9 =
  3. 3.801 × 999 =
  4. 4.16 × 9 =
  5. 5.3 × 9 =
  6. 6.311 × 99 =
  7. 7.8 × 9 =
  8. 8.84 × 99 =
  9. 9.204 × 9 =
  10. 10.135 × 9 =
  11. 11.45 × 99 =
  12. 12.168 × 99 =
  13. 13.7438 × 999 =
  14. 14.676 × 999 =
  15. 15.4 × 9 =
  16. 16.619 × 99 =
  17. 17.59 × 9 =
  18. 18.2 × 9 =
  19. 19.8255 × 999 =
  20. 20.816 × 999 =
  21. 21.16 × 9 =
  22. 22.98 × 999 =
  23. 23.76 × 9 =
  24. 24.103 × 9 =
  25. 25.8 × 9 =
  26. 26.8 × 9 =
  27. 27.2161 × 99 =
  28. 28.4 × 9 =
  29. 29.15801 × 999 =
  30. 30.66 × 99 =
  31. 31.2 × 9 =
  32. 32.2242 × 99 =
  33. 33.6 × 9 =
  34. 34.6 × 9 =
  35. 35.2 × 9 =
  36. 36.3 × 9 =
  37. 37.572 × 999 =
  38. 38.224 × 9 =
  39. 39.763 × 999 =
  40. 40.3 × 9 =

Answer key

  1. 165834
  2. 18
  3. 800199
  4. 144
  5. 27
  6. 30789
  7. 72
  8. 8316
  9. 1836
  10. 1215
  11. 4455
  12. 16632
  13. 7430562
  14. 675324
  15. 36
  16. 61281
  17. 531
  18. 18
  19. 8246745
  20. 815184
  21. 144
  22. 97902
  23. 684
  24. 927
  25. 72
  26. 72
  27. 213939
  28. 36
  29. 15785199
  30. 6534
  31. 18
  32. 221958
  33. 54
  34. 54
  35. 18
  36. 27
  37. 571428
  38. 2016
  39. 762237
  40. 27

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