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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 260 · 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. 1.2 × 9 =
  2. 2.5 × 9 =
  3. 3.44 × 9 =
  4. 4.249 × 999 =
  5. 5.2 × 9 =
  6. 6.2059 × 99 =
  7. 7.8 × 9 =
  8. 8.1366 × 99 =
  9. 9.906 × 999 =
  10. 10.6 × 9 =
  11. 11.1399 × 999 =
  12. 12.259 × 999 =
  13. 13.64 × 99 =
  14. 14.16 × 99 =
  15. 15.5 × 9 =
  16. 16.13 × 99 =
  17. 17.82 × 99 =
  18. 18.2 × 9 =
  19. 19.8 × 9 =
  20. 20.647 × 999 =
  21. 21.8878 × 999 =
  22. 22.174 × 9 =
  23. 23.6 × 9 =
  24. 24.432 × 999 =
  25. 25.2 × 9 =
  26. 26.257 × 999 =
  27. 27.8 × 9 =
  28. 28.25591 × 999 =
  29. 29.3 × 9 =
  30. 30.66 × 99 =
  31. 31.78 × 99 =
  32. 32.319 × 99 =
  33. 33.6 × 9 =
  34. 34.7 × 9 =
  35. 35.7 × 9 =
  36. 36.553 × 99 =
  37. 37.4206 × 999 =
  38. 38.11 × 999 =
  39. 39.3828 × 999 =
  40. 40.20808 × 999 =

Answer key

  1. 18
  2. 45
  3. 396
  4. 248751
  5. 18
  6. 203841
  7. 72
  8. 135234
  9. 905094
  10. 54
  11. 1397601
  12. 258741
  13. 6336
  14. 1584
  15. 45
  16. 1287
  17. 8118
  18. 18
  19. 72
  20. 646353
  21. 8869122
  22. 1566
  23. 54
  24. 431568
  25. 18
  26. 256743
  27. 72
  28. 25565409
  29. 27
  30. 6534
  31. 7722
  32. 31581
  33. 54
  34. 63
  35. 63
  36. 54747
  37. 4201794
  38. 10989
  39. 3824172
  40. 20787192

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