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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 760 · 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. 1.68 × 99 =
  2. 2.2 × 9 =
  3. 3.96 × 99 =
  4. 4.7 × 9 =
  5. 5.13 × 99 =
  6. 6.21 × 99 =
  7. 7.13306 × 999 =
  8. 8.7 × 9 =
  9. 9.661 × 999 =
  10. 10.4 × 9 =
  11. 11.7 × 9 =
  12. 12.71 × 99 =
  13. 13.567 × 999 =
  14. 14.23 × 9 =
  15. 15.233 × 9 =
  16. 16.3 × 99 =
  17. 17.4 × 9 =
  18. 18.843 × 999 =
  19. 19.13 × 99 =
  20. 20.53 × 9 =
  21. 21.15203 × 999 =
  22. 22.86 × 99 =
  23. 23.15267 × 999 =
  24. 24.2 × 9 =
  25. 25.205 × 9 =
  26. 26.1564 × 99 =
  27. 27.27 × 99 =
  28. 28.54 × 99 =
  29. 29.44 × 999 =
  30. 30.823 × 999 =
  31. 31.38 × 99 =
  32. 32.244 × 999 =
  33. 33.13 × 99 =
  34. 34.495 × 999 =
  35. 35.44 × 99 =
  36. 36.78 × 99 =
  37. 37.876 × 999 =
  38. 38.7 × 9 =
  39. 39.92 × 99 =
  40. 40.929 × 999 =

Answer key

  1. 6732
  2. 18
  3. 9504
  4. 63
  5. 1287
  6. 2079
  7. 13292694
  8. 63
  9. 660339
  10. 36
  11. 63
  12. 7029
  13. 566433
  14. 207
  15. 2097
  16. 297
  17. 36
  18. 842157
  19. 1287
  20. 477
  21. 15187797
  22. 8514
  23. 15251733
  24. 18
  25. 1845
  26. 154836
  27. 2673
  28. 5346
  29. 43956
  30. 822177
  31. 3762
  32. 243756
  33. 1287
  34. 494505
  35. 4356
  36. 7722
  37. 875124
  38. 63
  39. 9108
  40. 928071

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