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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 411 · 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. 1.2935 × 99 =
  2. 2.19 × 99 =
  3. 3.9494 × 999 =
  4. 4.452 × 999 =
  5. 5.1358 × 99 =
  6. 6.15 × 99 =
  7. 7.8 × 9 =
  8. 8.374 × 999 =
  9. 9.9289 × 999 =
  10. 10.668 × 999 =
  11. 11.14784 × 999 =
  12. 12.13 × 99 =
  13. 13.311 × 999 =
  14. 14.3 × 9 =
  15. 15.997 × 999 =
  16. 16.2 × 9 =
  17. 17.703 × 999 =
  18. 18.8 × 9 =
  19. 19.89 × 99 =
  20. 20.2106 × 99 =
  21. 21.382 × 999 =
  22. 22.55 × 999 =
  23. 23.7 × 9 =
  24. 24.232 × 999 =
  25. 25.511 × 999 =
  26. 26.2 × 9 =
  27. 27.25 × 9 =
  28. 28.6 × 9 =
  29. 29.7 × 9 =
  30. 30.3 × 9 =
  31. 31.6 × 9 =
  32. 32.1616 × 99 =
  33. 33.4 × 9 =
  34. 34.237 × 999 =
  35. 35.91 × 99 =
  36. 36.5 × 9 =
  37. 37.2788 × 99 =
  38. 38.3 × 9 =
  39. 39.5 × 9 =
  40. 40.5 × 9 =

Answer key

  1. 290565
  2. 1881
  3. 9484506
  4. 451548
  5. 134442
  6. 1485
  7. 72
  8. 373626
  9. 9279711
  10. 667332
  11. 14769216
  12. 1287
  13. 310689
  14. 27
  15. 996003
  16. 18
  17. 702297
  18. 72
  19. 8811
  20. 208494
  21. 381618
  22. 54945
  23. 63
  24. 231768
  25. 510489
  26. 18
  27. 225
  28. 54
  29. 63
  30. 27
  31. 54
  32. 159984
  33. 36
  34. 236763
  35. 9009
  36. 45
  37. 276012
  38. 27
  39. 45
  40. 45

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