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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 803 · 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. 1.78 × 99 =
  2. 2.18772 × 999 =
  3. 3.871 × 999 =
  4. 4.222 × 999 =
  5. 5.11664 × 999 =
  6. 6.458 × 99 =
  7. 7.21 × 99 =
  8. 8.241 × 9 =
  9. 9.491 × 999 =
  10. 10.552 × 99 =
  11. 11.7 × 9 =
  12. 12.674 × 999 =
  13. 13.2 × 9 =
  14. 14.2658 × 99 =
  15. 15.2 × 9 =
  16. 16.3911 × 999 =
  17. 17.74 × 99 =
  18. 18.2 × 9 =
  19. 19.23 × 999 =
  20. 20.92 × 99 =
  21. 21.164 × 9 =
  22. 22.17775 × 999 =
  23. 23.48 × 99 =
  24. 24.44 × 99 =
  25. 25.2165 × 99 =
  26. 26.967 × 999 =
  27. 27.1523 × 99 =
  28. 28.6 × 9 =
  29. 29.854 × 999 =
  30. 30.16 × 99 =
  31. 31.119 × 999 =
  32. 32.131 × 9 =
  33. 33.3 × 9 =
  34. 34.51 × 99 =
  35. 35.2 × 9 =
  36. 36.8 × 9 =
  37. 37.203 × 99 =
  38. 38.12935 × 999 =
  39. 39.7 × 9 =
  40. 40.674 × 999 =

Answer key

  1. 7722
  2. 18753228
  3. 870129
  4. 221778
  5. 11652336
  6. 45342
  7. 2079
  8. 2169
  9. 490509
  10. 54648
  11. 63
  12. 673326
  13. 18
  14. 263142
  15. 18
  16. 3907089
  17. 7326
  18. 18
  19. 22977
  20. 9108
  21. 1476
  22. 17757225
  23. 4752
  24. 4356
  25. 214335
  26. 966033
  27. 150777
  28. 54
  29. 853146
  30. 1584
  31. 118881
  32. 1179
  33. 27
  34. 5049
  35. 18
  36. 72
  37. 20097
  38. 12922065
  39. 63
  40. 673326

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