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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 4 · 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. 1.21 × 99 =
  2. 2.151 × 9 =
  3. 3.174 × 9 =
  4. 4.81 × 99 =
  5. 5.8 × 9 =
  6. 6.17 × 99 =
  7. 7.56 × 9 =
  8. 8.94 × 99 =
  9. 9.5 × 9 =
  10. 10.6 × 9 =
  11. 11.48 × 99 =
  12. 12.849 × 999 =
  13. 13.2251 × 99 =
  14. 14.96 × 99 =
  15. 15.2 × 9 =
  16. 16.9554 × 999 =
  17. 17.7 × 9 =
  18. 18.3 × 9 =
  19. 19.27 × 99 =
  20. 20.8715 × 999 =
  21. 21.12 × 9 =
  22. 22.192 × 999 =
  23. 23.146 × 9 =
  24. 24.331 × 999 =
  25. 25.961 × 999 =
  26. 26.506 × 99 =
  27. 27.8 × 9 =
  28. 28.85 × 9 =
  29. 29.184 × 999 =
  30. 30.3 × 9 =
  31. 31.42 × 9 =
  32. 32.228 × 999 =
  33. 33.6 × 9 =
  34. 34.8 × 9 =
  35. 35.6 × 9 =
  36. 36.6 × 9 =
  37. 37.24 × 99 =
  38. 38.67 × 99 =
  39. 39.577 × 999 =
  40. 40.117 × 999 =

Answer key

  1. 2079
  2. 1359
  3. 1566
  4. 8019
  5. 72
  6. 1683
  7. 504
  8. 9306
  9. 45
  10. 54
  11. 4752
  12. 848151
  13. 222849
  14. 9504
  15. 18
  16. 9544446
  17. 63
  18. 27
  19. 2673
  20. 8706285
  21. 108
  22. 191808
  23. 1314
  24. 330669
  25. 960039
  26. 50094
  27. 72
  28. 765
  29. 183816
  30. 27
  31. 378
  32. 227772
  33. 54
  34. 72
  35. 54
  36. 54
  37. 2376
  38. 6633
  39. 576423
  40. 116883

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