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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 19 · 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. 1.34 × 99 =
  2. 2.7 × 9 =
  3. 3.64 × 9 =
  4. 4.3 × 9 =
  5. 5.8179 × 999 =
  6. 6.32 × 99 =
  7. 7.44 × 99 =
  8. 8.4 × 99 =
  9. 9.801 × 99 =
  10. 10.118 × 999 =
  11. 11.7 × 9 =
  12. 12.3 × 9 =
  13. 13.8 × 9 =
  14. 14.47 × 99 =
  15. 15.2 × 9 =
  16. 16.11872 × 999 =
  17. 17.21 × 99 =
  18. 18.6 × 9 =
  19. 19.4 × 9 =
  20. 20.8 × 9 =
  21. 21.562 × 999 =
  22. 22.6 × 9 =
  23. 23.2 × 9 =
  24. 24.204 × 9 =
  25. 25.6 × 9 =
  26. 26.4 × 9 =
  27. 27.3 × 9 =
  28. 28.14933 × 999 =
  29. 29.2 × 9 =
  30. 30.54 × 99 =
  31. 31.341 × 999 =
  32. 32.94 × 99 =
  33. 33.1196 × 99 =
  34. 34.19 × 99 =
  35. 35.8 × 9 =
  36. 36.2 × 9 =
  37. 37.2 × 9 =
  38. 38.4 × 9 =
  39. 39.6 × 99 =
  40. 40.2 × 9 =

Answer key

  1. 3366
  2. 63
  3. 576
  4. 27
  5. 8170821
  6. 3168
  7. 4356
  8. 396
  9. 79299
  10. 117882
  11. 63
  12. 27
  13. 72
  14. 4653
  15. 18
  16. 11860128
  17. 2079
  18. 54
  19. 36
  20. 72
  21. 561438
  22. 54
  23. 18
  24. 1836
  25. 54
  26. 36
  27. 27
  28. 14918067
  29. 18
  30. 5346
  31. 340659
  32. 9306
  33. 118404
  34. 1881
  35. 72
  36. 18
  37. 18
  38. 36
  39. 594
  40. 18

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