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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 176 · 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. 1.93 × 99 =
  2. 2.258 × 999 =
  3. 3.3 × 9 =
  4. 4.1201 × 99 =
  5. 5.1226 × 99 =
  6. 6.734 × 999 =
  7. 7.2873 × 99 =
  8. 8.103 × 9 =
  9. 9.4 × 9 =
  10. 10.3 × 9 =
  11. 11.2153 × 99 =
  12. 12.2 × 9 =
  13. 13.16 × 999 =
  14. 14.578 × 999 =
  15. 15.6 × 9 =
  16. 16.5 × 9 =
  17. 17.1501 × 999 =
  18. 18.44 × 99 =
  19. 19.47 × 99 =
  20. 20.14 × 99 =
  21. 21.467 × 999 =
  22. 22.874 × 99 =
  23. 23.317 × 999 =
  24. 24.2533 × 99 =
  25. 25.2 × 9 =
  26. 26.1288 × 99 =
  27. 27.8 × 9 =
  28. 28.7 × 9 =
  29. 29.78 × 99 =
  30. 30.3 × 9 =
  31. 31.5 × 9 =
  32. 32.4 × 9 =
  33. 33.49 × 99 =
  34. 34.513 × 99 =
  35. 35.2 × 9 =
  36. 36.264 × 9 =
  37. 37.84 × 9 =
  38. 38.921 × 999 =
  39. 39.119 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 9207
  2. 257742
  3. 27
  4. 118899
  5. 121374
  6. 733266
  7. 284427
  8. 927
  9. 36
  10. 27
  11. 213147
  12. 18
  13. 15984
  14. 577422
  15. 54
  16. 45
  17. 1499499
  18. 4356
  19. 4653
  20. 1386
  21. 466533
  22. 86526
  23. 316683
  24. 250767
  25. 18
  26. 127512
  27. 72
  28. 63
  29. 7722
  30. 27
  31. 45
  32. 36
  33. 4851
  34. 50787
  35. 18
  36. 2376
  37. 756
  38. 920079
  39. 1071
  40. 72

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