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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 540 · 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. 1.84 × 99 =
  2. 2.8 × 9 =
  3. 3.1347 × 99 =
  4. 4.193 × 9 =
  5. 5.11 × 99 =
  6. 6.671 × 999 =
  7. 7.1052 × 99 =
  8. 8.2 × 9 =
  9. 9.2 × 9 =
  10. 10.46 × 99 =
  11. 11.241 × 999 =
  12. 12.5 × 9 =
  13. 13.2778 × 99 =
  14. 14.8 × 9 =
  15. 15.542 × 999 =
  16. 16.13 × 99 =
  17. 17.69 × 999 =
  18. 18.82 × 99 =
  19. 19.42 × 99 =
  20. 20.72 × 99 =
  21. 21.54 × 99 =
  22. 22.98 × 99 =
  23. 23.2384 × 99 =
  24. 24.5997 × 999 =
  25. 25.44 × 99 =
  26. 26.41 × 99 =
  27. 27.3 × 9 =
  28. 28.17825 × 999 =
  29. 29.19 × 99 =
  30. 30.722 × 99 =
  31. 31.81 × 99 =
  32. 32.18 × 99 =
  33. 33.201 × 999 =
  34. 34.169 × 999 =
  35. 35.2 × 9 =
  36. 36.8 × 9 =
  37. 37.3 × 9 =
  38. 38.46 × 99 =
  39. 39.21455 × 999 =
  40. 40.6 × 9 =

Answer key

  1. 8316
  2. 72
  3. 133353
  4. 1737
  5. 1089
  6. 670329
  7. 104148
  8. 18
  9. 18
  10. 4554
  11. 240759
  12. 45
  13. 275022
  14. 72
  15. 541458
  16. 1287
  17. 68931
  18. 8118
  19. 4158
  20. 7128
  21. 5346
  22. 9702
  23. 236016
  24. 5991003
  25. 4356
  26. 4059
  27. 27
  28. 17807175
  29. 1881
  30. 71478
  31. 8019
  32. 1782
  33. 200799
  34. 168831
  35. 18
  36. 72
  37. 27
  38. 4554
  39. 21433545
  40. 54

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