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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 421 · 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. 1.5 × 9 =
  2. 2.3584 × 999 =
  3. 3.4663 × 999 =
  4. 4.3 × 9 =
  5. 5.466 × 999 =
  6. 6.2524 × 99 =
  7. 7.88 × 99 =
  8. 8.1215 × 99 =
  9. 9.9 × 99 =
  10. 10.15 × 99 =
  11. 11.8 × 9 =
  12. 12.21 × 99 =
  13. 13.43 × 99 =
  14. 14.4 × 9 =
  15. 15.1381 × 99 =
  16. 16.5 × 9 =
  17. 17.942 × 999 =
  18. 18.149 × 9 =
  19. 19.52 × 99 =
  20. 20.86 × 999 =
  21. 21.35 × 9 =
  22. 22.68 × 99 =
  23. 23.59 × 99 =
  24. 24.465 × 999 =
  25. 25.86 × 99 =
  26. 26.977 × 999 =
  27. 27.611 × 999 =
  28. 28.211 × 9 =
  29. 29.812 × 999 =
  30. 30.3 × 9 =
  31. 31.7 × 9 =
  32. 32.44 × 99 =
  33. 33.36 × 99 =
  34. 34.564 × 999 =
  35. 35.217 × 999 =
  36. 36.8 × 9 =
  37. 37.8 × 9 =
  38. 38.6 × 9 =
  39. 39.3 × 9 =
  40. 40.2968 × 99 =

Answer key

  1. 45
  2. 3580416
  3. 4658337
  4. 27
  5. 465534
  6. 249876
  7. 8712
  8. 120285
  9. 891
  10. 1485
  11. 72
  12. 2079
  13. 4257
  14. 36
  15. 136719
  16. 45
  17. 941058
  18. 1341
  19. 5148
  20. 85914
  21. 315
  22. 6732
  23. 5841
  24. 464535
  25. 8514
  26. 976023
  27. 610389
  28. 1899
  29. 811188
  30. 27
  31. 63
  32. 4356
  33. 3564
  34. 563436
  35. 216783
  36. 72
  37. 72
  38. 54
  39. 27
  40. 293832

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