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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 531 · 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. 1.7 × 9 =
  2. 2.8 × 9 =
  3. 3.148 × 9 =
  4. 4.279 × 999 =
  5. 5.5 × 9 =
  6. 6.851 × 999 =
  7. 7.26797 × 999 =
  8. 8.26 × 99 =
  9. 9.2478 × 99 =
  10. 10.6 × 99 =
  11. 11.253 × 9 =
  12. 12.2 × 9 =
  13. 13.27926 × 999 =
  14. 14.2573 × 99 =
  15. 15.13 × 99 =
  16. 16.948 × 999 =
  17. 17.5 × 9 =
  18. 18.211 × 9 =
  19. 19.63 × 99 =
  20. 20.2231 × 99 =
  21. 21.91 × 99 =
  22. 22.227 × 9 =
  23. 23.703 × 999 =
  24. 24.4 × 9 =
  25. 25.3 × 9 =
  26. 26.58 × 9 =
  27. 27.26031 × 999 =
  28. 28.432 × 999 =
  29. 29.8 × 9 =
  30. 30.31 × 9 =
  31. 31.6 × 9 =
  32. 32.264 × 9 =
  33. 33.785 × 999 =
  34. 34.3 × 9 =
  35. 35.701 × 999 =
  36. 36.2 × 9 =
  37. 37.82 × 999 =
  38. 38.811 × 999 =
  39. 39.1313 × 999 =
  40. 40.7 × 9 =

Answer key

  1. 63
  2. 72
  3. 1332
  4. 278721
  5. 45
  6. 850149
  7. 26770203
  8. 2574
  9. 245322
  10. 594
  11. 2277
  12. 18
  13. 27898074
  14. 254727
  15. 1287
  16. 947052
  17. 45
  18. 1899
  19. 6237
  20. 220869
  21. 9009
  22. 2043
  23. 702297
  24. 36
  25. 27
  26. 522
  27. 26004969
  28. 431568
  29. 72
  30. 279
  31. 54
  32. 2376
  33. 784215
  34. 27
  35. 700299
  36. 18
  37. 81918
  38. 810189
  39. 1311687
  40. 63

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