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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 848 · 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. 1.235 × 999 =
  2. 2.19303 × 999 =
  3. 3.586 × 999 =
  4. 4.7 × 9 =
  5. 5.13 × 9 =
  6. 6.2126 × 99 =
  7. 7.23889 × 999 =
  8. 8.2 × 9 =
  9. 9.918 × 999 =
  10. 10.7 × 9 =
  11. 11.47 × 999 =
  12. 12.6 × 9 =
  13. 13.223 × 9 =
  14. 14.41 × 99 =
  15. 15.4 × 9 =
  16. 16.307 × 999 =
  17. 17.998 × 999 =
  18. 18.22 × 99 =
  19. 19.32 × 99 =
  20. 20.6715 × 999 =
  21. 21.8 × 9 =
  22. 22.7 × 9 =
  23. 23.1719 × 99 =
  24. 24.8 × 9 =
  25. 25.4 × 9 =
  26. 26.8 × 9 =
  27. 27.1772 × 99 =
  28. 28.59 × 99 =
  29. 29.23 × 99 =
  30. 30.3 × 9 =
  31. 31.66 × 9 =
  32. 32.204 × 9 =
  33. 33.3 × 9 =
  34. 34.2333 × 99 =
  35. 35.5 × 9 =
  36. 36.879 × 999 =
  37. 37.6 × 9 =
  38. 38.9171 × 999 =
  39. 39.2733 × 99 =
  40. 40.49 × 99 =

Answer key

  1. 234765
  2. 19283697
  3. 585414
  4. 63
  5. 117
  6. 210474
  7. 23865111
  8. 18
  9. 917082
  10. 63
  11. 46953
  12. 54
  13. 2007
  14. 4059
  15. 36
  16. 306693
  17. 997002
  18. 2178
  19. 3168
  20. 6708285
  21. 72
  22. 63
  23. 170181
  24. 72
  25. 36
  26. 72
  27. 175428
  28. 5841
  29. 2277
  30. 27
  31. 594
  32. 1836
  33. 27
  34. 230967
  35. 45
  36. 878121
  37. 54
  38. 9161829
  39. 270567
  40. 4851

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