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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 388 · 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. 1.6 × 9 =
  2. 2.87 × 99 =
  3. 3.7 × 9 =
  4. 4.847 × 99 =
  5. 5.7 × 9 =
  6. 6.6 × 9 =
  7. 7.43 × 99 =
  8. 8.8 × 9 =
  9. 9.2323 × 99 =
  10. 10.719 × 99 =
  11. 11.582 × 99 =
  12. 12.106 × 9 =
  13. 13.8 × 9 =
  14. 14.7 × 9 =
  15. 15.3 × 9 =
  16. 16.3 × 9 =
  17. 17.267 × 9 =
  18. 18.95 × 9 =
  19. 19.98 × 99 =
  20. 20.22 × 99 =
  21. 21.296 × 999 =
  22. 22.321 × 999 =
  23. 23.2 × 9 =
  24. 24.2 × 9 =
  25. 25.6 × 9 =
  26. 26.5 × 9 =
  27. 27.188 × 9 =
  28. 28.7 × 9 =
  29. 29.6 × 9 =
  30. 30.3 × 99 =
  31. 31.14 × 99 =
  32. 32.89 × 99 =
  33. 33.82 × 99 =
  34. 34.19 × 99 =
  35. 35.238 × 999 =
  36. 36.24 × 99 =
  37. 37.4 × 9 =
  38. 38.5 × 9 =
  39. 39.6 × 99 =
  40. 40.13967 × 999 =

Answer key

  1. 54
  2. 8613
  3. 63
  4. 83853
  5. 63
  6. 54
  7. 4257
  8. 72
  9. 229977
  10. 71181
  11. 57618
  12. 954
  13. 72
  14. 63
  15. 27
  16. 27
  17. 2403
  18. 855
  19. 9702
  20. 2178
  21. 295704
  22. 320679
  23. 18
  24. 18
  25. 54
  26. 45
  27. 1692
  28. 63
  29. 54
  30. 297
  31. 1386
  32. 8811
  33. 8118
  34. 1881
  35. 237762
  36. 2376
  37. 36
  38. 45
  39. 594
  40. 13953033

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