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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 905 · 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. 1.3 × 9 =
  2. 2.554 × 999 =
  3. 3.2 × 9 =
  4. 4.25 × 99 =
  5. 5.153 × 9 =
  6. 6.28387 × 999 =
  7. 7.3 × 9 =
  8. 8.179 × 999 =
  9. 9.8 × 9 =
  10. 10.851 × 99 =
  11. 11.3 × 9 =
  12. 12.168 × 999 =
  13. 13.53 × 99 =
  14. 14.5 × 9 =
  15. 15.1749 × 99 =
  16. 16.55 × 9 =
  17. 17.7 × 9 =
  18. 18.27 × 99 =
  19. 19.19397 × 999 =
  20. 20.61 × 99 =
  21. 21.19 × 99 =
  22. 22.338 × 999 =
  23. 23.2652 × 999 =
  24. 24.45 × 99 =
  25. 25.37 × 99 =
  26. 26.8 × 9 =
  27. 27.734 × 999 =
  28. 28.45 × 9 =
  29. 29.5 × 9 =
  30. 30.15 × 99 =
  31. 31.4 × 9 =
  32. 32.695 × 999 =
  33. 33.23014 × 999 =
  34. 34.25711 × 999 =
  35. 35.20325 × 999 =
  36. 36.3 × 9 =
  37. 37.5 × 9 =
  38. 38.5 × 9 =
  39. 39.441 × 999 =
  40. 40.103 × 9 =

Answer key

  1. 27
  2. 553446
  3. 18
  4. 2475
  5. 1377
  6. 28358613
  7. 27
  8. 178821
  9. 72
  10. 84249
  11. 27
  12. 167832
  13. 5247
  14. 45
  15. 173151
  16. 495
  17. 63
  18. 2673
  19. 19377603
  20. 6039
  21. 1881
  22. 337662
  23. 2649348
  24. 4455
  25. 3663
  26. 72
  27. 733266
  28. 405
  29. 45
  30. 1485
  31. 36
  32. 694305
  33. 22990986
  34. 25685289
  35. 20304675
  36. 27
  37. 45
  38. 45
  39. 440559
  40. 927

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