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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 568 · 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. 1.22237 × 999 =
  2. 2.2222 × 99 =
  3. 3.44 × 99 =
  4. 4.1643 × 99 =
  5. 5.111 × 9 =
  6. 6.3 × 9 =
  7. 7.74 × 99 =
  8. 8.17527 × 999 =
  9. 9.5 × 9 =
  10. 10.7 × 9 =
  11. 11.45 × 9 =
  12. 12.145 × 9 =
  13. 13.2726 × 99 =
  14. 14.982 × 999 =
  15. 15.268 × 99 =
  16. 16.16 × 99 =
  17. 17.38 × 9 =
  18. 18.41 × 99 =
  19. 19.3 × 9 =
  20. 20.6 × 9 =
  21. 21.5 × 9 =
  22. 22.178 × 9 =
  23. 23.7 × 9 =
  24. 24.118 × 999 =
  25. 25.452 × 999 =
  26. 26.49 × 99 =
  27. 27.216 × 9 =
  28. 28.8 × 9 =
  29. 29.669 × 999 =
  30. 30.777 × 999 =
  31. 31.25 × 999 =
  32. 32.6 × 9 =
  33. 33.96 × 99 =
  34. 34.8 × 9 =
  35. 35.8 × 9 =
  36. 36.263 × 9 =
  37. 37.2435 × 99 =
  38. 38.2711 × 99 =
  39. 39.138 × 9 =
  40. 40.69 × 99 =

Answer key

  1. 22214763
  2. 219978
  3. 4356
  4. 162657
  5. 999
  6. 27
  7. 7326
  8. 17509473
  9. 45
  10. 63
  11. 405
  12. 1305
  13. 269874
  14. 981018
  15. 26532
  16. 1584
  17. 342
  18. 4059
  19. 27
  20. 54
  21. 45
  22. 1602
  23. 63
  24. 117882
  25. 451548
  26. 4851
  27. 1944
  28. 72
  29. 668331
  30. 776223
  31. 24975
  32. 54
  33. 9504
  34. 72
  35. 72
  36. 2367
  37. 241065
  38. 268389
  39. 1242
  40. 6831

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