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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 511 · 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. 1.14 × 99 =
  2. 2.68 × 99 =
  3. 3.6 × 9 =
  4. 4.28 × 99 =
  5. 5.38 × 9 =
  6. 6.34 × 99 =
  7. 7.82 × 9 =
  8. 8.61 × 9 =
  9. 9.8 × 99 =
  10. 10.5 × 99 =
  11. 11.15 × 99 =
  12. 12.2 × 99 =
  13. 13.5 × 9 =
  14. 14.892 × 999 =
  15. 15.7 × 9 =
  16. 16.738 × 999 =
  17. 17.5 × 9 =
  18. 18.3 × 9 =
  19. 19.79 × 99 =
  20. 20.51 × 9 =
  21. 21.8 × 9 =
  22. 22.88 × 9 =
  23. 23.29088 × 999 =
  24. 24.214 × 999 =
  25. 25.14 × 9 =
  26. 26.7 × 9 =
  27. 27.96 × 99 =
  28. 28.966 × 999 =
  29. 29.4 × 9 =
  30. 30.4 × 9 =
  31. 31.3 × 9 =
  32. 32.3 × 9 =
  33. 33.992 × 99 =
  34. 34.16512 × 999 =
  35. 35.56 × 999 =
  36. 36.6 × 9 =
  37. 37.3 × 99 =
  38. 38.23 × 99 =
  39. 39.2 × 9 =
  40. 40.4 × 9 =

Answer key

  1. 1386
  2. 6732
  3. 54
  4. 2772
  5. 342
  6. 3366
  7. 738
  8. 549
  9. 792
  10. 495
  11. 1485
  12. 198
  13. 45
  14. 891108
  15. 63
  16. 737262
  17. 45
  18. 27
  19. 7821
  20. 459
  21. 72
  22. 792
  23. 29058912
  24. 213786
  25. 126
  26. 63
  27. 9504
  28. 965034
  29. 36
  30. 36
  31. 27
  32. 27
  33. 98208
  34. 16495488
  35. 55944
  36. 54
  37. 297
  38. 2277
  39. 18
  40. 36

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