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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 925 · 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. 1.41 × 99 =
  2. 2.3 × 9 =
  3. 3.225 × 999 =
  4. 4.3 × 9 =
  5. 5.185 × 999 =
  6. 6.61 × 99 =
  7. 7.6 × 9 =
  8. 8.234 × 999 =
  9. 9.972 × 999 =
  10. 10.17 × 99 =
  11. 11.598 × 99 =
  12. 12.8 × 9 =
  13. 13.147 × 9 =
  14. 14.101 × 9 =
  15. 15.2 × 9 =
  16. 16.36 × 99 =
  17. 17.24 × 99 =
  18. 18.2 × 9 =
  19. 19.624 × 999 =
  20. 20.21 × 9 =
  21. 21.65 × 99 =
  22. 22.2 × 9 =
  23. 23.74 × 9 =
  24. 24.17 × 99 =
  25. 25.278 × 999 =
  26. 26.3 × 9 =
  27. 27.8 × 9 =
  28. 28.2238 × 99 =
  29. 29.15 × 9 =
  30. 30.29 × 99 =
  31. 31.199 × 999 =
  32. 32.61 × 99 =
  33. 33.72 × 99 =
  34. 34.1229 × 99 =
  35. 35.338 × 999 =
  36. 36.1148 × 99 =
  37. 37.2035 × 99 =
  38. 38.1073 × 999 =
  39. 39.3 × 9 =
  40. 40.46 × 999 =

Answer key

  1. 4059
  2. 27
  3. 224775
  4. 27
  5. 184815
  6. 6039
  7. 54
  8. 233766
  9. 971028
  10. 1683
  11. 59202
  12. 72
  13. 1323
  14. 909
  15. 18
  16. 3564
  17. 2376
  18. 18
  19. 623376
  20. 189
  21. 6435
  22. 18
  23. 666
  24. 1683
  25. 277722
  26. 27
  27. 72
  28. 221562
  29. 135
  30. 2871
  31. 198801
  32. 6039
  33. 7128
  34. 121671
  35. 337662
  36. 113652
  37. 201465
  38. 1071927
  39. 27
  40. 45954

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