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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 10 · 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. 1.72 × 99 =
  2. 2.5 × 9 =
  3. 3.20926 × 999 =
  4. 4.2 × 9 =
  5. 5.2 × 9 =
  6. 6.6 × 9 =
  7. 7.8 × 9 =
  8. 8.2874 × 99 =
  9. 9.362 × 99 =
  10. 10.7 × 9 =
  11. 11.942 × 999 =
  12. 12.76 × 9 =
  13. 13.185 × 9 =
  14. 14.13106 × 999 =
  15. 15.36 × 99 =
  16. 16.13053 × 999 =
  17. 17.46 × 9 =
  18. 18.3 × 9 =
  19. 19.71 × 99 =
  20. 20.1988 × 999 =
  21. 21.199 × 999 =
  22. 22.8 × 9 =
  23. 23.36 × 99 =
  24. 24.57 × 99 =
  25. 25.6 × 9 =
  26. 26.31 × 99 =
  27. 27.3 × 9 =
  28. 28.2245 × 99 =
  29. 29.5 × 9 =
  30. 30.168 × 999 =
  31. 31.19 × 99 =
  32. 32.2411 × 99 =
  33. 33.891 × 999 =
  34. 34.25 × 99 =
  35. 35.2576 × 99 =
  36. 36.34 × 99 =
  37. 37.1412 × 99 =
  38. 38.3 × 9 =
  39. 39.8 × 9 =
  40. 40.5 × 9 =

Answer key

  1. 7128
  2. 45
  3. 20905074
  4. 18
  5. 18
  6. 54
  7. 72
  8. 284526
  9. 35838
  10. 63
  11. 941058
  12. 684
  13. 1665
  14. 13092894
  15. 3564
  16. 13039947
  17. 414
  18. 27
  19. 7029
  20. 1986012
  21. 198801
  22. 72
  23. 3564
  24. 5643
  25. 54
  26. 3069
  27. 27
  28. 222255
  29. 45
  30. 167832
  31. 1881
  32. 238689
  33. 890109
  34. 2475
  35. 255024
  36. 3366
  37. 139788
  38. 27
  39. 72
  40. 45

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