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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 340 · 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. 1.5 × 9 =
  2. 2.2 × 9 =
  3. 3.56 × 99 =
  4. 4.341 × 999 =
  5. 5.19 × 99 =
  6. 6.679 × 999 =
  7. 7.5 × 9 =
  8. 8.76 × 99 =
  9. 9.52 × 999 =
  10. 10.6 × 9 =
  11. 11.7 × 9 =
  12. 12.91 × 99 =
  13. 13.446 × 99 =
  14. 14.232 × 9 =
  15. 15.4 × 9 =
  16. 16.19179 × 999 =
  17. 17.87 × 99 =
  18. 18.4 × 9 =
  19. 19.6 × 9 =
  20. 20.658 × 999 =
  21. 21.63 × 99 =
  22. 22.6 × 9 =
  23. 23.42 × 99 =
  24. 24.23 × 99 =
  25. 25.29526 × 999 =
  26. 26.3 × 9 =
  27. 27.484 × 99 =
  28. 28.8 × 9 =
  29. 29.3 × 9 =
  30. 30.2 × 9 =
  31. 31.108 × 9 =
  32. 32.41 × 9 =
  33. 33.3 × 9 =
  34. 34.44 × 99 =
  35. 35.653 × 99 =
  36. 36.2 × 9 =
  37. 37.19 × 9 =
  38. 38.93 × 99 =
  39. 39.3 × 9 =
  40. 40.1091 × 99 =

Answer key

  1. 45
  2. 18
  3. 5544
  4. 340659
  5. 1881
  6. 678321
  7. 45
  8. 7524
  9. 51948
  10. 54
  11. 63
  12. 9009
  13. 44154
  14. 2088
  15. 36
  16. 19159821
  17. 8613
  18. 36
  19. 54
  20. 657342
  21. 6237
  22. 54
  23. 4158
  24. 2277
  25. 29496474
  26. 27
  27. 47916
  28. 72
  29. 27
  30. 18
  31. 972
  32. 369
  33. 27
  34. 4356
  35. 64647
  36. 18
  37. 171
  38. 9207
  39. 27
  40. 108009

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