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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 251 · 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. 1.199 × 9 =
  2. 2.826 × 999 =
  3. 3.204 × 9 =
  4. 4.2 × 99 =
  5. 5.411 × 999 =
  6. 6.122 × 999 =
  7. 7.154 × 999 =
  8. 8.31 × 99 =
  9. 9.3 × 99 =
  10. 10.1933 × 99 =
  11. 11.5 × 9 =
  12. 12.53 × 9 =
  13. 13.44 × 99 =
  14. 14.908 × 999 =
  15. 15.28088 × 999 =
  16. 16.46 × 99 =
  17. 17.44 × 99 =
  18. 18.356 × 99 =
  19. 19.31 × 99 =
  20. 20.208 × 999 =
  21. 21.5 × 9 =
  22. 22.2687 × 99 =
  23. 23.2948 × 99 =
  24. 24.6 × 9 =
  25. 25.2 × 9 =
  26. 26.6 × 99 =
  27. 27.541 × 999 =
  28. 28.46 × 9 =
  29. 29.28 × 999 =
  30. 30.21 × 99 =
  31. 31.5 × 9 =
  32. 32.631 × 999 =
  33. 33.6264 × 999 =
  34. 34.983 × 999 =
  35. 35.245 × 99 =
  36. 36.153 × 9 =
  37. 37.32 × 99 =
  38. 38.4 × 9 =
  39. 39.78 × 99 =
  40. 40.5 × 9 =

Answer key

  1. 1791
  2. 825174
  3. 1836
  4. 198
  5. 410589
  6. 121878
  7. 153846
  8. 3069
  9. 297
  10. 191367
  11. 45
  12. 477
  13. 4356
  14. 907092
  15. 28059912
  16. 4554
  17. 4356
  18. 35244
  19. 3069
  20. 207792
  21. 45
  22. 266013
  23. 291852
  24. 54
  25. 18
  26. 594
  27. 540459
  28. 414
  29. 27972
  30. 2079
  31. 45
  32. 630369
  33. 6257736
  34. 982017
  35. 24255
  36. 1377
  37. 3168
  38. 36
  39. 7722
  40. 45

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