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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 985 · 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. 1.95 × 99 =
  2. 2.304 × 99 =
  3. 3.13 × 99 =
  4. 4.421 × 99 =
  5. 5.2 × 9 =
  6. 6.62 × 9 =
  7. 7.5 × 9 =
  8. 8.963 × 999 =
  9. 9.1333 × 99 =
  10. 10.12875 × 999 =
  11. 11.2407 × 999 =
  12. 12.7 × 9 =
  13. 13.7 × 9 =
  14. 14.195 × 999 =
  15. 15.4 × 9 =
  16. 16.131 × 999 =
  17. 17.7 × 9 =
  18. 18.36 × 99 =
  19. 19.72 × 99 =
  20. 20.41 × 9 =
  21. 21.255 × 9 =
  22. 22.2184 × 99 =
  23. 23.455 × 99 =
  24. 24.28096 × 999 =
  25. 25.97 × 99 =
  26. 26.92 × 99 =
  27. 27.3 × 9 =
  28. 28.8 × 9 =
  29. 29.51 × 9 =
  30. 30.26588 × 999 =
  31. 31.2 × 9 =
  32. 32.3 × 9 =
  33. 33.4806 × 999 =
  34. 34.5 × 9 =
  35. 35.201 × 999 =
  36. 36.34 × 99 =
  37. 37.738 × 999 =
  38. 38.635 × 999 =
  39. 39.251 × 9 =
  40. 40.4 × 9 =

Answer key

  1. 9405
  2. 30096
  3. 1287
  4. 41679
  5. 18
  6. 558
  7. 45
  8. 962037
  9. 131967
  10. 12862125
  11. 2404593
  12. 63
  13. 63
  14. 194805
  15. 36
  16. 130869
  17. 63
  18. 3564
  19. 7128
  20. 369
  21. 2295
  22. 216216
  23. 45045
  24. 28067904
  25. 9603
  26. 9108
  27. 27
  28. 72
  29. 459
  30. 26561412
  31. 18
  32. 27
  33. 4801194
  34. 45
  35. 200799
  36. 3366
  37. 737262
  38. 634365
  39. 2259
  40. 36

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