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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 819 · 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. 1.8 × 99 =
  2. 2.823 × 999 =
  3. 3.4 × 9 =
  4. 4.106 × 9 =
  5. 5.4 × 99 =
  6. 6.1083 × 99 =
  7. 7.43 × 99 =
  8. 8.7 × 9 =
  9. 9.1527 × 99 =
  10. 10.224 × 9 =
  11. 11.65 × 99 =
  12. 12.71 × 99 =
  13. 13.8 × 9 =
  14. 14.22943 × 999 =
  15. 15.1035 × 999 =
  16. 16.7 × 9 =
  17. 17.628 × 99 =
  18. 18.2 × 9 =
  19. 19.3 × 9 =
  20. 20.14 × 99 =
  21. 21.285 × 999 =
  22. 22.4 × 9 =
  23. 23.11 × 99 =
  24. 24.15 × 99 =
  25. 25.5 × 9 =
  26. 26.8 × 9 =
  27. 27.4 × 9 =
  28. 28.2 × 99 =
  29. 29.63 × 99 =
  30. 30.21 × 99 =
  31. 31.3 × 9 =
  32. 32.7 × 99 =
  33. 33.77 × 99 =
  34. 34.141 × 9 =
  35. 35.92 × 99 =
  36. 36.7 × 9 =
  37. 37.121 × 9 =
  38. 38.2 × 9 =
  39. 39.8 × 9 =
  40. 40.3 × 9 =

Answer key

  1. 792
  2. 822177
  3. 36
  4. 954
  5. 396
  6. 107217
  7. 4257
  8. 63
  9. 151173
  10. 2016
  11. 6435
  12. 7029
  13. 72
  14. 22920057
  15. 1033965
  16. 63
  17. 62172
  18. 18
  19. 27
  20. 1386
  21. 284715
  22. 36
  23. 1089
  24. 1485
  25. 45
  26. 72
  27. 36
  28. 198
  29. 6237
  30. 2079
  31. 27
  32. 693
  33. 7623
  34. 1269
  35. 9108
  36. 63
  37. 1089
  38. 18
  39. 72
  40. 27

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