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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 514 · 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. 1.3 × 9 =
  2. 2.144 × 9 =
  3. 3.4 × 9 =
  4. 4.24 × 99 =
  5. 5.966 × 999 =
  6. 6.19 × 99 =
  7. 7.26318 × 999 =
  8. 8.271 × 9 =
  9. 9.7 × 9 =
  10. 10.8 × 9 =
  11. 11.889 × 999 =
  12. 12.11 × 99 =
  13. 13.6 × 9 =
  14. 14.5 × 9 =
  15. 15.585 × 999 =
  16. 16.1408 × 99 =
  17. 17.623 × 999 =
  18. 18.22201 × 999 =
  19. 19.8 × 9 =
  20. 20.69 × 99 =
  21. 21.4 × 9 =
  22. 22.6 × 9 =
  23. 23.301 × 999 =
  24. 24.738 × 999 =
  25. 25.5 × 9 =
  26. 26.1217 × 99 =
  27. 27.115 × 999 =
  28. 28.19 × 99 =
  29. 29.3 × 9 =
  30. 30.84 × 999 =
  31. 31.93 × 99 =
  32. 32.156 × 999 =
  33. 33.96 × 99 =
  34. 34.5 × 9 =
  35. 35.244 × 999 =
  36. 36.7 × 9 =
  37. 37.13 × 99 =
  38. 38.2473 × 99 =
  39. 39.38 × 99 =
  40. 40.89 × 9 =

Answer key

  1. 27
  2. 1296
  3. 36
  4. 2376
  5. 965034
  6. 1881
  7. 26291682
  8. 2439
  9. 63
  10. 72
  11. 888111
  12. 1089
  13. 54
  14. 45
  15. 584415
  16. 139392
  17. 622377
  18. 22178799
  19. 72
  20. 6831
  21. 36
  22. 54
  23. 300699
  24. 737262
  25. 45
  26. 120483
  27. 114885
  28. 1881
  29. 27
  30. 83916
  31. 9207
  32. 155844
  33. 9504
  34. 45
  35. 243756
  36. 63
  37. 1287
  38. 244827
  39. 3762
  40. 801

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