Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 620 · 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. 1.2407 × 99 =
2. 2.88 × 99 =
3. 3.6 × 9 =
4. 4.4 × 9 =
5. 5.91 × 99 =
6. 6.202 × 9 =
7. 7.14571 × 999 =
8. 8.84 × 999 =
9. 9.5 × 9 =
10. 10.84 × 9 =
11. 11.595 × 999 =
12. 12.998 × 999 =
13. 13.866 × 999 =
14. 14.7 × 9 =
15. 15.805 × 999 =
16. 16.19829 × 999 =
17. 17.31 × 99 =
18. 18.6 × 9 =
19. 19.14 × 99 =
20. 20.248 × 9 =
21. 21.17 × 99 =
22. 22.997 × 99 =
23. 23.98 × 999 =
24. 24.81 × 9 =
25. 25.241 × 999 =
26. 26.26 × 99 =
27. 27.826 × 999 =
28. 28.721 × 999 =
29. 29.5 × 9 =
30. 30.4 × 9 =
31. 31.8 × 9 =
32. 32.2 × 9 =
33. 33.721 × 999 =
34. 34.2031 × 99 =
35. 35.2397 × 99 =
36. 36.6 × 9 =
37. 37.49 × 99 =
38. 38.5 × 9 =
39. 39.643 × 99 =
40. 40.8 × 9 =

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