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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 859 · 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. 1.9 × 99 =
  2. 2.3 × 9 =
  3. 3.5 × 9 =
  4. 4.22 × 99 =
  5. 5.16 × 99 =
  6. 6.742 × 999 =
  7. 7.8 × 9 =
  8. 8.54 × 99 =
  9. 9.22 × 99 =
  10. 10.376 × 999 =
  11. 11.94 × 9 =
  12. 12.20727 × 999 =
  13. 13.7 × 9 =
  14. 14.87 × 9 =
  15. 15.8 × 9 =
  16. 16.103 × 999 =
  17. 17.57 × 99 =
  18. 18.8 × 9 =
  19. 19.717 × 999 =
  20. 20.2 × 9 =
  21. 21.987 × 999 =
  22. 22.19 × 99 =
  23. 23.195 × 9 =
  24. 24.3 × 9 =
  25. 25.245 × 9 =
  26. 26.2312 × 99 =
  27. 27.66 × 99 =
  28. 28.137 × 999 =
  29. 29.79 × 99 =
  30. 30.675 × 999 =
  31. 31.347 × 999 =
  32. 32.98 × 99 =
  33. 33.842 × 999 =
  34. 34.7 × 9 =
  35. 35.81 × 9 =
  36. 36.6 × 9 =
  37. 37.7 × 9 =
  38. 38.96 × 99 =
  39. 39.21 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 891
  2. 27
  3. 45
  4. 2178
  5. 1584
  6. 741258
  7. 72
  8. 5346
  9. 2178
  10. 375624
  11. 846
  12. 20706273
  13. 63
  14. 783
  15. 72
  16. 102897
  17. 5643
  18. 72
  19. 716283
  20. 18
  21. 986013
  22. 1881
  23. 1755
  24. 27
  25. 2205
  26. 228888
  27. 6534
  28. 136863
  29. 7821
  30. 674325
  31. 346653
  32. 9702
  33. 841158
  34. 63
  35. 729
  36. 54
  37. 63
  38. 9504
  39. 189
  40. 72

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