Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 698 · 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. 1.81 × 99 =
2. 2.16 × 999 =
3. 3.135 × 9 =
4. 4.9484 × 999 =
5. 5.7 × 9 =
6. 6.8 × 9 =
7. 7.832 × 999 =
8. 8.85 × 99 =
9. 9.3 × 9 =
10. 10.117 × 999 =
11. 11.7 × 9 =
12. 12.8 × 9 =
13. 13.201 × 999 =
14. 14.2 × 9 =
15. 15.35 × 99 =
16. 16.2 × 9 =
17. 17.2 × 9 =
18. 18.803 × 999 =
19. 19.86 × 99 =
20. 20.43 × 99 =
21. 21.1421 × 99 =
22. 22.1603 × 99 =
23. 23.66 × 99 =
24. 24.51 × 99 =
25. 25.5 × 9 =
26. 26.31 × 99 =
27. 27.14 × 999 =
28. 28.145 × 9 =
29. 29.2 × 9 =
30. 30.8 × 9 =
31. 31.769 × 999 =
32. 32.264 × 9 =
33. 33.211 × 999 =
34. 34.239 × 9 =
35. 35.41 × 99 =
36. 36.41 × 99 =
37. 37.668 × 999 =
38. 38.5 × 9 =
39. 39.31 × 99 =
40. 40.3601 × 999 =

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