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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 359 · 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. 1.183 × 999 =
  2. 2.6 × 9 =
  3. 3.83 × 99 =
  4. 4.2364 × 99 =
  5. 5.848 × 999 =
  6. 6.8 × 9 =
  7. 7.3 × 9 =
  8. 8.8 × 9 =
  9. 9.89 × 99 =
  10. 10.6 × 9 =
  11. 11.57 × 9 =
  12. 12.6 × 99 =
  13. 13.5 × 9 =
  14. 14.34 × 99 =
  15. 15.6 × 9 =
  16. 16.8 × 9 =
  17. 17.633 × 999 =
  18. 18.35 × 99 =
  19. 19.2 × 9 =
  20. 20.2 × 9 =
  21. 21.1238 × 99 =
  22. 22.115 × 99 =
  23. 23.264 × 9 =
  24. 24.27 × 99 =
  25. 25.6 × 9 =
  26. 26.659 × 999 =
  27. 27.65 × 99 =
  28. 28.603 × 999 =
  29. 29.8441 × 999 =
  30. 30.17 × 99 =
  31. 31.8 × 9 =
  32. 32.7 × 9 =
  33. 33.31 × 99 =
  34. 34.5 × 9 =
  35. 35.71 × 999 =
  36. 36.8 × 9 =
  37. 37.2 × 9 =
  38. 38.592 × 999 =
  39. 39.41 × 999 =
  40. 40.198 × 999 =

Answer key

  1. 182817
  2. 54
  3. 8217
  4. 234036
  5. 847152
  6. 72
  7. 27
  8. 72
  9. 8811
  10. 54
  11. 513
  12. 594
  13. 45
  14. 3366
  15. 54
  16. 72
  17. 632367
  18. 3465
  19. 18
  20. 18
  21. 122562
  22. 11385
  23. 2376
  24. 2673
  25. 54
  26. 658341
  27. 6435
  28. 602397
  29. 8432559
  30. 1683
  31. 72
  32. 63
  33. 3069
  34. 45
  35. 70929
  36. 72
  37. 18
  38. 591408
  39. 40959
  40. 197802

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