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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 170 · 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. 1.75 × 99 =
  2. 2.12218 × 999 =
  3. 3.25049 × 999 =
  4. 4.7 × 9 =
  5. 5.2 × 9 =
  6. 6.4 × 9 =
  7. 7.2 × 9 =
  8. 8.94 × 9 =
  9. 9.78 × 9 =
  10. 10.906 × 999 =
  11. 11.94 × 99 =
  12. 12.159 × 9 =
  13. 13.52 × 9 =
  14. 14.2 × 9 =
  15. 15.3 × 9 =
  16. 16.12531 × 999 =
  17. 17.19139 × 999 =
  18. 18.26113 × 999 =
  19. 19.3465 × 999 =
  20. 20.2 × 9 =
  21. 21.768 × 999 =
  22. 22.66 × 99 =
  23. 23.27102 × 999 =
  24. 24.27431 × 999 =
  25. 25.318 × 999 =
  26. 26.4 × 9 =
  27. 27.4 × 99 =
  28. 28.146 × 999 =
  29. 29.74 × 99 =
  30. 30.7 × 9 =
  31. 31.61 × 99 =
  32. 32.3 × 9 =
  33. 33.932 × 999 =
  34. 34.29 × 99 =
  35. 35.6 × 9 =
  36. 36.798 × 999 =
  37. 37.45 × 99 =
  38. 38.5 × 9 =
  39. 39.226 × 9 =
  40. 40.12581 × 999 =

Answer key

  1. 7425
  2. 12205782
  3. 25023951
  4. 63
  5. 18
  6. 36
  7. 18
  8. 846
  9. 702
  10. 905094
  11. 9306
  12. 1431
  13. 468
  14. 18
  15. 27
  16. 12518469
  17. 19119861
  18. 26086887
  19. 3461535
  20. 18
  21. 767232
  22. 6534
  23. 27074898
  24. 27403569
  25. 317682
  26. 36
  27. 396
  28. 145854
  29. 7326
  30. 63
  31. 6039
  32. 27
  33. 931068
  34. 2871
  35. 54
  36. 797202
  37. 4455
  38. 45
  39. 2034
  40. 12568419

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