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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 965 · 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. 1.784 × 99 =
  2. 2.22 × 99 =
  3. 3.793 × 999 =
  4. 4.2925 × 99 =
  5. 5.5 × 9 =
  6. 6.2 × 9 =
  7. 7.2 × 9 =
  8. 8.165 × 9 =
  9. 9.2501 × 99 =
  10. 10.86 × 99 =
  11. 11.91 × 99 =
  12. 12.28 × 99 =
  13. 13.1751 × 99 =
  14. 14.2 × 9 =
  15. 15.7 × 9 =
  16. 16.229 × 9 =
  17. 17.8 × 9 =
  18. 18.13 × 9 =
  19. 19.89 × 99 =
  20. 20.2613 × 99 =
  21. 21.508 × 999 =
  22. 22.6 × 9 =
  23. 23.2 × 9 =
  24. 24.93 × 99 =
  25. 25.21315 × 999 =
  26. 26.598 × 999 =
  27. 27.78 × 99 =
  28. 28.17653 × 999 =
  29. 29.56 × 99 =
  30. 30.338 × 999 =
  31. 31.15 × 99 =
  32. 32.5 × 9 =
  33. 33.1722 × 99 =
  34. 34.31 × 99 =
  35. 35.3361 × 999 =
  36. 36.55 × 99 =
  37. 37.5 × 9 =
  38. 38.376 × 999 =
  39. 39.1628 × 99 =
  40. 40.402 × 999 =

Answer key

  1. 77616
  2. 2178
  3. 792207
  4. 289575
  5. 45
  6. 18
  7. 18
  8. 1485
  9. 247599
  10. 8514
  11. 9009
  12. 2772
  13. 173349
  14. 18
  15. 63
  16. 2061
  17. 72
  18. 117
  19. 8811
  20. 258687
  21. 507492
  22. 54
  23. 18
  24. 9207
  25. 21293685
  26. 597402
  27. 7722
  28. 17635347
  29. 5544
  30. 337662
  31. 1485
  32. 45
  33. 170478
  34. 3069
  35. 3357639
  36. 5445
  37. 45
  38. 375624
  39. 161172
  40. 401598

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