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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 871 · 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. 1.12177 × 999 =
  2. 2.702 × 999 =
  3. 3.961 × 999 =
  4. 4.258 × 9 =
  5. 5.2351 × 99 =
  6. 6.8 × 9 =
  7. 7.4 × 9 =
  8. 8.29 × 99 =
  9. 9.7 × 9 =
  10. 10.4 × 9 =
  11. 11.85 × 999 =
  12. 12.3 × 9 =
  13. 13.4 × 9 =
  14. 14.7 × 9 =
  15. 15.21 × 99 =
  16. 16.6 × 9 =
  17. 17.25997 × 999 =
  18. 18.1874 × 99 =
  19. 19.18 × 99 =
  20. 20.234 × 999 =
  21. 21.97 × 99 =
  22. 22.3 × 9 =
  23. 23.81 × 99 =
  24. 24.791 × 999 =
  25. 25.7 × 9 =
  26. 26.2 × 9 =
  27. 27.136 × 9 =
  28. 28.602 × 999 =
  29. 29.904 × 99 =
  30. 30.99 × 9 =
  31. 31.41 × 9 =
  32. 32.2323 × 99 =
  33. 33.22776 × 999 =
  34. 34.92 × 99 =
  35. 35.76 × 99 =
  36. 36.265 × 9 =
  37. 37.239 × 9 =
  38. 38.2 × 9 =
  39. 39.365 × 999 =
  40. 40.34 × 999 =

Answer key

  1. 12164823
  2. 701298
  3. 960039
  4. 2322
  5. 232749
  6. 72
  7. 36
  8. 2871
  9. 63
  10. 36
  11. 84915
  12. 27
  13. 36
  14. 63
  15. 2079
  16. 54
  17. 25971003
  18. 185526
  19. 1782
  20. 233766
  21. 9603
  22. 27
  23. 8019
  24. 790209
  25. 63
  26. 18
  27. 1224
  28. 601398
  29. 89496
  30. 891
  31. 369
  32. 229977
  33. 22753224
  34. 9108
  35. 7524
  36. 2385
  37. 2151
  38. 18
  39. 364635
  40. 33966

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