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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 114 · 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 × 9 =
  2. 2.15131 × 999 =
  3. 3.11 × 9 =
  4. 4.7 × 9 =
  5. 5.7 × 9 =
  6. 6.6 × 9 =
  7. 7.3959 × 999 =
  8. 8.54 × 99 =
  9. 9.5 × 9 =
  10. 10.5 × 9 =
  11. 11.7857 × 999 =
  12. 12.2888 × 99 =
  13. 13.569 × 999 =
  14. 14.6 × 9 =
  15. 15.31 × 999 =
  16. 16.304 × 999 =
  17. 17.374 × 999 =
  18. 18.4 × 9 =
  19. 19.8 × 9 =
  20. 20.185 × 9 =
  21. 21.7 × 9 =
  22. 22.391 × 99 =
  23. 23.21 × 99 =
  24. 24.3 × 9 =
  25. 25.691 × 999 =
  26. 26.21 × 99 =
  27. 27.23 × 99 =
  28. 28.182 × 9 =
  29. 29.115 × 9 =
  30. 30.71 × 99 =
  31. 31.785 × 999 =
  32. 32.915 × 999 =
  33. 33.255 × 9 =
  34. 34.8 × 9 =
  35. 35.8 × 9 =
  36. 36.91 × 99 =
  37. 37.3 × 9 =
  38. 38.44 × 99 =
  39. 39.1596 × 99 =
  40. 40.425 × 999 =

Answer key

  1. 369
  2. 15115869
  3. 99
  4. 63
  5. 63
  6. 54
  7. 3955041
  8. 5346
  9. 45
  10. 45
  11. 7849143
  12. 285912
  13. 568431
  14. 54
  15. 30969
  16. 303696
  17. 373626
  18. 36
  19. 72
  20. 1665
  21. 63
  22. 38709
  23. 2079
  24. 27
  25. 690309
  26. 2079
  27. 2277
  28. 1638
  29. 1035
  30. 7029
  31. 784215
  32. 914085
  33. 2295
  34. 72
  35. 72
  36. 9009
  37. 27
  38. 4356
  39. 158004
  40. 424575

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