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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 276 · 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. 1.3 × 99 =
  2. 2.971 × 999 =
  3. 3.1041 × 99 =
  4. 4.28 × 99 =
  5. 5.17 × 99 =
  6. 6.2 × 9 =
  7. 7.294 × 999 =
  8. 8.31 × 99 =
  9. 9.361 × 999 =
  10. 10.673 × 999 =
  11. 11.7 × 99 =
  12. 12.887 × 99 =
  13. 13.45 × 99 =
  14. 14.684 × 999 =
  15. 15.67 × 99 =
  16. 16.29 × 9 =
  17. 17.88 × 99 =
  18. 18.174 × 9 =
  19. 19.411 × 999 =
  20. 20.26867 × 999 =
  21. 21.1151 × 99 =
  22. 22.5 × 9 =
  23. 23.937 × 999 =
  24. 24.16 × 99 =
  25. 25.2199 × 99 =
  26. 26.5 × 9 =
  27. 27.3 × 9 =
  28. 28.79 × 99 =
  29. 29.4 × 9 =
  30. 30.258 × 9 =
  31. 31.3 × 9 =
  32. 32.2 × 9 =
  33. 33.76 × 99 =
  34. 34.3 × 99 =
  35. 35.84 × 99 =
  36. 36.17 × 9 =
  37. 37.2 × 9 =
  38. 38.81 × 99 =
  39. 39.3 × 9 =
  40. 40.101 × 999 =

Answer key

  1. 297
  2. 970029
  3. 103059
  4. 2772
  5. 1683
  6. 18
  7. 293706
  8. 3069
  9. 360639
  10. 672327
  11. 693
  12. 87813
  13. 4455
  14. 683316
  15. 6633
  16. 261
  17. 8712
  18. 1566
  19. 410589
  20. 26840133
  21. 113949
  22. 45
  23. 936063
  24. 1584
  25. 217701
  26. 45
  27. 27
  28. 7821
  29. 36
  30. 2322
  31. 27
  32. 18
  33. 7524
  34. 297
  35. 8316
  36. 153
  37. 18
  38. 8019
  39. 27
  40. 100899

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