Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 399 · 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. 1.1732 × 99 =
2. 2.5 × 9 =
3. 3.5 × 9 =
4. 4.4 × 9 =
5. 5.91 × 99 =
6. 6.83 × 99 =
7. 7.7 × 9 =
8. 8.6 × 9 =
9. 9.172 × 9 =
10. 10.151 × 9 =
11. 11.71 × 9 =
12. 12.43 × 99 =
13. 13.41 × 99 =
14. 14.861 × 99 =
15. 15.2886 × 99 =
16. 16.261 × 9 =
17. 17.145 × 9 =
18. 18.8 × 9 =
19. 19.94 × 99 =
20. 20.5 × 9 =
21. 21.11547 × 999 =
22. 22.95 × 99 =
23. 23.2082 × 99 =
24. 24.6 × 9 =
25. 25.268 × 999 =
26. 26.345 × 999 =
27. 27.248 × 9 =
28. 28.77 × 99 =
29. 29.9 × 99 =
30. 30.231 × 999 =
31. 31.711 × 999 =
32. 32.537 × 999 =
33. 33.6 × 9 =
34. 34.3 × 9 =
35. 35.91 × 999 =
36. 36.3 × 9 =
37. 37.77 × 99 =
38. 38.175 × 9 =
39. 39.24 × 99 =
40. 40.53 × 99 =

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