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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 520 · 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. 1.63 × 99 =
  2. 2.473 × 999 =
  3. 3.1918 × 99 =
  4. 4.453 × 999 =
  5. 5.105 × 9 =
  6. 6.7 × 9 =
  7. 7.2 × 99 =
  8. 8.6 × 9 =
  9. 9.8 × 9 =
  10. 10.786 × 999 =
  11. 11.63 × 99 =
  12. 12.3 × 9 =
  13. 13.748 × 999 =
  14. 14.2 × 9 =
  15. 15.97 × 999 =
  16. 16.32 × 99 =
  17. 17.4791 × 999 =
  18. 18.89 × 99 =
  19. 19.569 × 999 =
  20. 20.107 × 9 =
  21. 21.6 × 9 =
  22. 22.3 × 9 =
  23. 23.53 × 99 =
  24. 24.292 × 999 =
  25. 25.2766 × 99 =
  26. 26.22 × 99 =
  27. 27.37 × 9 =
  28. 28.17555 × 999 =
  29. 29.16131 × 999 =
  30. 30.13735 × 999 =
  31. 31.8 × 9 =
  32. 32.291 × 999 =
  33. 33.5 × 9 =
  34. 34.7 × 9 =
  35. 35.2 × 9 =
  36. 36.6293 × 999 =
  37. 37.68 × 99 =
  38. 38.7441 × 999 =
  39. 39.854 × 999 =
  40. 40.7 × 99 =

Answer key

  1. 6237
  2. 472527
  3. 189882
  4. 452547
  5. 945
  6. 63
  7. 198
  8. 54
  9. 72
  10. 785214
  11. 6237
  12. 27
  13. 747252
  14. 18
  15. 96903
  16. 3168
  17. 4786209
  18. 8811
  19. 568431
  20. 963
  21. 54
  22. 27
  23. 5247
  24. 291708
  25. 273834
  26. 2178
  27. 333
  28. 17537445
  29. 16114869
  30. 13721265
  31. 72
  32. 290709
  33. 45
  34. 63
  35. 18
  36. 6286707
  37. 6732
  38. 7433559
  39. 853146
  40. 693

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