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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 864 · 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. 1.521 × 999 =
  2. 2.8 × 9 =
  3. 3.8 × 9 =
  4. 4.8 × 9 =
  5. 5.2 × 9 =
  6. 6.6 × 9 =
  7. 7.18 × 99 =
  8. 8.12 × 99 =
  9. 9.243 × 9 =
  10. 10.57 × 9 =
  11. 11.81 × 99 =
  12. 12.14997 × 999 =
  13. 13.5 × 99 =
  14. 14.202 × 9 =
  15. 15.6 × 9 =
  16. 16.4 × 9 =
  17. 17.183 × 9 =
  18. 18.19741 × 999 =
  19. 19.5 × 9 =
  20. 20.2806 × 999 =
  21. 21.36 × 9 =
  22. 22.131 × 9 =
  23. 23.51 × 99 =
  24. 24.3 × 9 =
  25. 25.95 × 99 =
  26. 26.74 × 9 =
  27. 27.1357 × 99 =
  28. 28.128 × 99 =
  29. 29.142 × 9 =
  30. 30.1416 × 99 =
  31. 31.237 × 9 =
  32. 32.3 × 9 =
  33. 33.27863 × 999 =
  34. 34.7 × 9 =
  35. 35.76 × 99 =
  36. 36.8 × 9 =
  37. 37.41 × 99 =
  38. 38.13061 × 999 =
  39. 39.815 × 999 =
  40. 40.59 × 99 =

Answer key

  1. 520479
  2. 72
  3. 72
  4. 72
  5. 18
  6. 54
  7. 1782
  8. 1188
  9. 2187
  10. 513
  11. 8019
  12. 14982003
  13. 495
  14. 1818
  15. 54
  16. 36
  17. 1647
  18. 19721259
  19. 45
  20. 2803194
  21. 324
  22. 1179
  23. 5049
  24. 27
  25. 9405
  26. 666
  27. 134343
  28. 12672
  29. 1278
  30. 140184
  31. 2133
  32. 27
  33. 27835137
  34. 63
  35. 7524
  36. 72
  37. 4059
  38. 13047939
  39. 814185
  40. 5841

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