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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 395 · 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. 1.4 × 9 =
  2. 2.5 × 9 =
  3. 3.1781 × 99 =
  4. 4.107 × 999 =
  5. 5.3 × 9 =
  6. 6.6 × 9 =
  7. 7.3 × 9 =
  8. 8.102 × 9 =
  9. 9.237 × 9 =
  10. 10.93 × 9 =
  11. 11.26916 × 999 =
  12. 12.4 × 9 =
  13. 13.5 × 9 =
  14. 14.5 × 9 =
  15. 15.2 × 9 =
  16. 16.15 × 99 =
  17. 17.61 × 99 =
  18. 18.18 × 99 =
  19. 19.9 × 99 =
  20. 20.59 × 99 =
  21. 21.4 × 9 =
  22. 22.7 × 9 =
  23. 23.346 × 999 =
  24. 24.1088 × 99 =
  25. 25.95 × 99 =
  26. 26.23081 × 999 =
  27. 27.7 × 9 =
  28. 28.96 × 99 =
  29. 29.8 × 9 =
  30. 30.8 × 9 =
  31. 31.3 × 9 =
  32. 32.2 × 9 =
  33. 33.3 × 9 =
  34. 34.811 × 999 =
  35. 35.37 × 99 =
  36. 36.63 × 9 =
  37. 37.5 × 9 =
  38. 38.87 × 99 =
  39. 39.47 × 99 =
  40. 40.46 × 99 =

Answer key

  1. 36
  2. 45
  3. 176319
  4. 106893
  5. 27
  6. 54
  7. 27
  8. 918
  9. 2133
  10. 837
  11. 26889084
  12. 36
  13. 45
  14. 45
  15. 18
  16. 1485
  17. 6039
  18. 1782
  19. 891
  20. 5841
  21. 36
  22. 63
  23. 345654
  24. 107712
  25. 9405
  26. 23057919
  27. 63
  28. 9504
  29. 72
  30. 72
  31. 27
  32. 18
  33. 27
  34. 810189
  35. 3663
  36. 567
  37. 45
  38. 8613
  39. 4653
  40. 4554

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