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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 875 · 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. 1.5 × 9 =
  2. 2.10495 × 999 =
  3. 3.68 × 99 =
  4. 4.18 × 99 =
  5. 5.2246 × 99 =
  6. 6.2 × 9 =
  7. 7.61 × 99 =
  8. 8.535 × 999 =
  9. 9.56 × 999 =
  10. 10.5 × 9 =
  11. 11.26267 × 999 =
  12. 12.8 × 9 =
  13. 13.744 × 999 =
  14. 14.374 × 999 =
  15. 15.85 × 9 =
  16. 16.1188 × 99 =
  17. 17.21 × 99 =
  18. 18.34 × 99 =
  19. 19.8838 × 999 =
  20. 20.2 × 9 =
  21. 21.8 × 9 =
  22. 22.538 × 99 =
  23. 23.808 × 99 =
  24. 24.6 × 9 =
  25. 25.18631 × 999 =
  26. 26.39 × 99 =
  27. 27.2708 × 99 =
  28. 28.448 × 999 =
  29. 29.4 × 9 =
  30. 30.28 × 99 =
  31. 31.6 × 9 =
  32. 32.19036 × 999 =
  33. 33.22 × 99 =
  34. 34.2161 × 99 =
  35. 35.2 × 9 =
  36. 36.15 × 99 =
  37. 37.7 × 9 =
  38. 38.233 × 9 =
  39. 39.2108 × 99 =
  40. 40.3 × 9 =

Answer key

  1. 45
  2. 10484505
  3. 6732
  4. 1782
  5. 222354
  6. 18
  7. 6039
  8. 534465
  9. 55944
  10. 45
  11. 26240733
  12. 72
  13. 743256
  14. 373626
  15. 765
  16. 117612
  17. 2079
  18. 3366
  19. 8829162
  20. 18
  21. 72
  22. 53262
  23. 79992
  24. 54
  25. 18612369
  26. 3861
  27. 268092
  28. 447552
  29. 36
  30. 2772
  31. 54
  32. 19016964
  33. 2178
  34. 213939
  35. 18
  36. 1485
  37. 63
  38. 2097
  39. 208692
  40. 27

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