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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 951 · 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. 1.11 × 99 =
  2. 2.45 × 9 =
  3. 3.2 × 9 =
  4. 4.6556 × 999 =
  5. 5.37 × 9 =
  6. 6.7 × 9 =
  7. 7.81 × 99 =
  8. 8.475 × 999 =
  9. 9.25 × 99 =
  10. 10.3 × 99 =
  11. 11.42 × 99 =
  12. 12.949 × 99 =
  13. 13.81 × 99 =
  14. 14.94 × 99 =
  15. 15.62 × 99 =
  16. 16.6 × 9 =
  17. 17.11 × 99 =
  18. 18.8 × 9 =
  19. 19.17 × 99 =
  20. 20.21 × 99 =
  21. 21.42 × 99 =
  22. 22.7 × 9 =
  23. 23.382 × 999 =
  24. 24.99 × 9 =
  25. 25.7 × 99 =
  26. 26.694 × 999 =
  27. 27.306 × 99 =
  28. 28.2622 × 99 =
  29. 29.721 × 999 =
  30. 30.452 × 999 =
  31. 31.182 × 999 =
  32. 32.1757 × 99 =
  33. 33.123 × 999 =
  34. 34.2 × 99 =
  35. 35.2 × 9 =
  36. 36.132 × 9 =
  37. 37.552 × 999 =
  38. 38.5 × 9 =
  39. 39.897 × 999 =
  40. 40.389 × 999 =

Answer key

  1. 1089
  2. 405
  3. 18
  4. 6549444
  5. 333
  6. 63
  7. 8019
  8. 474525
  9. 2475
  10. 297
  11. 4158
  12. 93951
  13. 8019
  14. 9306
  15. 6138
  16. 54
  17. 1089
  18. 72
  19. 1683
  20. 2079
  21. 4158
  22. 63
  23. 381618
  24. 891
  25. 693
  26. 693306
  27. 30294
  28. 259578
  29. 720279
  30. 451548
  31. 181818
  32. 173943
  33. 122877
  34. 198
  35. 18
  36. 1188
  37. 551448
  38. 45
  39. 896103
  40. 388611

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