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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 900 · 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. 1.267 × 9 =
  2. 2.42 × 99 =
  3. 3.723 × 999 =
  4. 4.268 × 9 =
  5. 5.6 × 9 =
  6. 6.2 × 9 =
  7. 7.8 × 9 =
  8. 8.3 × 9 =
  9. 9.2121 × 99 =
  10. 10.6 × 9 =
  11. 11.25 × 9 =
  12. 12.5 × 9 =
  13. 13.514 × 999 =
  14. 14.3 × 9 =
  15. 15.3 × 9 =
  16. 16.2204 × 99 =
  17. 17.20585 × 999 =
  18. 18.16 × 999 =
  19. 19.431 × 999 =
  20. 20.4 × 9 =
  21. 21.51 × 999 =
  22. 22.79 × 99 =
  23. 23.4 × 9 =
  24. 24.95 × 99 =
  25. 25.4 × 9 =
  26. 26.7 × 9 =
  27. 27.2 × 9 =
  28. 28.183 × 9 =
  29. 29.228 × 9 =
  30. 30.53 × 99 =
  31. 31.8 × 9 =
  32. 32.5 × 9 =
  33. 33.56 × 99 =
  34. 34.91 × 99 =
  35. 35.5 × 9 =
  36. 36.2659 × 99 =
  37. 37.6 × 9 =
  38. 38.338 × 999 =
  39. 39.3 × 9 =
  40. 40.18771 × 999 =

Answer key

  1. 2403
  2. 4158
  3. 722277
  4. 2412
  5. 54
  6. 18
  7. 72
  8. 27
  9. 209979
  10. 54
  11. 225
  12. 45
  13. 513486
  14. 27
  15. 27
  16. 218196
  17. 20564415
  18. 15984
  19. 430569
  20. 36
  21. 50949
  22. 7821
  23. 36
  24. 9405
  25. 36
  26. 63
  27. 18
  28. 1647
  29. 2052
  30. 5247
  31. 72
  32. 45
  33. 5544
  34. 9009
  35. 45
  36. 263241
  37. 54
  38. 337662
  39. 27
  40. 18752229

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