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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 741 · 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. 1.13 × 99 =
  2. 2.837 × 999 =
  3. 3.916 × 99 =
  4. 4.49 × 99 =
  5. 5.8 × 9 =
  6. 6.716 × 999 =
  7. 7.6 × 9 =
  8. 8.243 × 9 =
  9. 9.19026 × 999 =
  10. 10.244 × 9 =
  11. 11.4 × 9 =
  12. 12.148 × 9 =
  13. 13.48 × 99 =
  14. 14.3 × 9 =
  15. 15.571 × 99 =
  16. 16.28 × 9 =
  17. 17.6 × 9 =
  18. 18.2 × 9 =
  19. 19.772 × 999 =
  20. 20.8 × 9 =
  21. 21.41 × 999 =
  22. 22.11385 × 999 =
  23. 23.466 × 999 =
  24. 24.20112 × 999 =
  25. 25.8 × 9 =
  26. 26.4 × 9 =
  27. 27.41 × 99 =
  28. 28.49 × 99 =
  29. 29.2 × 9 =
  30. 30.177 × 999 =
  31. 31.5 × 9 =
  32. 32.8 × 9 =
  33. 33.16251 × 999 =
  34. 34.144 × 999 =
  35. 35.611 × 999 =
  36. 36.208 × 999 =
  37. 37.88 × 99 =
  38. 38.5 × 99 =
  39. 39.692 × 99 =
  40. 40.8 × 9 =

Answer key

  1. 1287
  2. 836163
  3. 90684
  4. 4851
  5. 72
  6. 715284
  7. 54
  8. 2187
  9. 19006974
  10. 2196
  11. 36
  12. 1332
  13. 4752
  14. 27
  15. 56529
  16. 252
  17. 54
  18. 18
  19. 771228
  20. 72
  21. 40959
  22. 11373615
  23. 465534
  24. 20091888
  25. 72
  26. 36
  27. 4059
  28. 4851
  29. 18
  30. 176823
  31. 45
  32. 72
  33. 16234749
  34. 143856
  35. 610389
  36. 207792
  37. 8712
  38. 495
  39. 68508
  40. 72

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