Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 510 · 40 sums

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.

1. 1.98 × 99 =
2. 2.17771 × 999 =
3. 3.21 × 99 =
4. 4.68 × 9 =
5. 5.5 × 9 =
6. 6.85 × 99 =
7. 7.912 × 999 =
8. 8.42 × 99 =
9. 9.241 × 9 =
10. 10.87 × 99 =
11. 11.872 × 999 =
12. 12.4 × 9 =
13. 13.5 × 9 =
14. 14.95 × 99 =
15. 15.69 × 99 =
16. 16.97 × 99 =
17. 17.17 × 99 =
18. 18.175 × 999 =
19. 19.107 × 99 =
20. 20.17 × 9 =
21. 21.8 × 9 =
22. 22.2 × 9 =
23. 23.641 × 999 =
24. 24.29 × 99 =
25. 25.2 × 9 =
26. 26.1723 × 99 =
27. 27.172 × 9 =
28. 28.4 × 9 =
29. 29.73 × 99 =
30. 30.21 × 9 =
31. 31.168 × 99 =
32. 32.81 × 99 =
33. 33.8 × 9 =
34. 34.2 × 9 =
35. 35.63 × 99 =
36. 36.613 × 99 =
37. 37.465 × 999 =
38. 38.2634 × 99 =
39. 39.2149 × 99 =
40. 40.171 × 9 =

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