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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 36 · 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. 1.521 × 999 =
  2. 2.37 × 99 =
  3. 3.52 × 99 =
  4. 4.647 × 99 =
  5. 5.179 × 999 =
  6. 6.4 × 9 =
  7. 7.17 × 9 =
  8. 8.28961 × 999 =
  9. 9.7 × 9 =
  10. 10.931 × 999 =
  11. 11.193 × 9 =
  12. 12.6 × 9 =
  13. 13.9 × 999 =
  14. 14.5 × 9 =
  15. 15.92 × 999 =
  16. 16.1902 × 99 =
  17. 17.2161 × 99 =
  18. 18.8 × 9 =
  19. 19.21 × 99 =
  20. 20.4514 × 999 =
  21. 21.87 × 99 =
  22. 22.387 × 999 =
  23. 23.6 × 99 =
  24. 24.511 × 99 =
  25. 25.2072 × 99 =
  26. 26.128 × 999 =
  27. 27.548 × 999 =
  28. 28.37 × 99 =
  29. 29.51 × 99 =
  30. 30.506 × 999 =
  31. 31.15 × 99 =
  32. 32.4 × 9 =
  33. 33.847 × 99 =
  34. 34.2 × 9 =
  35. 35.871 × 999 =
  36. 36.753 × 999 =
  37. 37.134 × 9 =
  38. 38.7 × 9 =
  39. 39.11043 × 999 =
  40. 40.4 × 9 =

Answer key

  1. 520479
  2. 3663
  3. 5148
  4. 64053
  5. 178821
  6. 36
  7. 153
  8. 28932039
  9. 63
  10. 930069
  11. 1737
  12. 54
  13. 8991
  14. 45
  15. 91908
  16. 188298
  17. 213939
  18. 72
  19. 2079
  20. 4509486
  21. 8613
  22. 386613
  23. 594
  24. 50589
  25. 205128
  26. 127872
  27. 547452
  28. 3663
  29. 5049
  30. 505494
  31. 1485
  32. 36
  33. 83853
  34. 18
  35. 870129
  36. 752247
  37. 1206
  38. 63
  39. 11031957
  40. 36

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