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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 303 · 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. 1.95 × 99 =
  2. 2.71 × 9 =
  3. 3.34 × 99 =
  4. 4.236 × 9 =
  5. 5.18 × 999 =
  6. 6.1331 × 99 =
  7. 7.4 × 9 =
  8. 8.668 × 999 =
  9. 9.2 × 9 =
  10. 10.1687 × 99 =
  11. 11.16475 × 999 =
  12. 12.19737 × 999 =
  13. 13.5 × 9 =
  14. 14.392 × 999 =
  15. 15.63 × 9 =
  16. 16.1312 × 99 =
  17. 17.2 × 9 =
  18. 18.254 × 999 =
  19. 19.62 × 99 =
  20. 20.72 × 99 =
  21. 21.4 × 9 =
  22. 22.1339 × 99 =
  23. 23.61 × 99 =
  24. 24.68 × 99 =
  25. 25.4 × 9 =
  26. 26.2 × 9 =
  27. 27.54 × 999 =
  28. 28.4 × 9 =
  29. 29.2553 × 99 =
  30. 30.68 × 99 =
  31. 31.31 × 999 =
  32. 32.12 × 9 =
  33. 33.3 × 9 =
  34. 34.5 × 9 =
  35. 35.507 × 999 =
  36. 36.211 × 9 =
  37. 37.2 × 9 =
  38. 38.33 × 99 =
  39. 39.28 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 9405
  2. 639
  3. 3366
  4. 2124
  5. 17982
  6. 131769
  7. 36
  8. 667332
  9. 18
  10. 167013
  11. 16458525
  12. 19717263
  13. 45
  14. 391608
  15. 567
  16. 129888
  17. 18
  18. 253746
  19. 6138
  20. 7128
  21. 36
  22. 132561
  23. 6039
  24. 6732
  25. 36
  26. 18
  27. 53946
  28. 36
  29. 252747
  30. 6732
  31. 30969
  32. 108
  33. 27
  34. 45
  35. 506493
  36. 1899
  37. 18
  38. 3267
  39. 252
  40. 72

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