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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 50 · 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. 1.2758 × 99 =
  2. 2.47 × 99 =
  3. 3.54 × 99 =
  4. 4.752 × 999 =
  5. 5.773 × 999 =
  6. 6.5 × 9 =
  7. 7.8 × 9 =
  8. 8.469 × 999 =
  9. 9.886 × 999 =
  10. 10.12 × 99 =
  11. 11.1881 × 99 =
  12. 12.256 × 9 =
  13. 13.1243 × 99 =
  14. 14.3 × 9 =
  15. 15.2503 × 99 =
  16. 16.56 × 99 =
  17. 17.6 × 9 =
  18. 18.797 × 99 =
  19. 19.4396 × 999 =
  20. 20.1267 × 99 =
  21. 21.3 × 9 =
  22. 22.123 × 9 =
  23. 23.5 × 99 =
  24. 24.5 × 9 =
  25. 25.388 × 999 =
  26. 26.919 × 999 =
  27. 27.83 × 99 =
  28. 28.16 × 99 =
  29. 29.96 × 99 =
  30. 30.19 × 99 =
  31. 31.591 × 999 =
  32. 32.93 × 99 =
  33. 33.538 × 99 =
  34. 34.33 × 9 =
  35. 35.6 × 9 =
  36. 36.18361 × 999 =
  37. 37.8 × 99 =
  38. 38.139 × 9 =
  39. 39.138 × 999 =
  40. 40.219 × 9 =

Answer key

  1. 273042
  2. 4653
  3. 5346
  4. 751248
  5. 772227
  6. 45
  7. 72
  8. 468531
  9. 885114
  10. 1188
  11. 186219
  12. 2304
  13. 123057
  14. 27
  15. 247797
  16. 5544
  17. 54
  18. 78903
  19. 4391604
  20. 125433
  21. 27
  22. 1107
  23. 495
  24. 45
  25. 387612
  26. 918081
  27. 8217
  28. 1584
  29. 9504
  30. 1881
  31. 590409
  32. 9207
  33. 53262
  34. 297
  35. 54
  36. 18342639
  37. 792
  38. 1251
  39. 137862
  40. 1971

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