Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 18 · 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. 1.1388 × 99 =
2. 2.91 × 99 =
3. 3.4 × 9 =
4. 4.4 × 9 =
5. 5.24 × 99 =
6. 6.5 × 9 =
7. 7.63 × 99 =
8. 8.46 × 99 =
9. 9.156 × 999 =
10. 10.74 × 99 =
11. 11.28 × 99 =
12. 12.1808 × 999 =
13. 13.5 × 9 =
14. 14.471 × 999 =
15. 15.2377 × 99 =
16. 16.2191 × 99 =
17. 17.3 × 9 =
18. 18.2 × 9 =
19. 19.48 × 99 =
20. 20.791 × 99 =
21. 21.31 × 99 =
22. 22.87 × 9 =
23. 23.43 × 99 =
24. 24.82 × 9 =
25. 25.11 × 99 =
26. 26.2851 × 99 =
27. 27.711 × 999 =
28. 28.8 × 99 =
29. 29.1762 × 99 =
30. 30.9526 × 999 =
31. 31.52 × 99 =
32. 32.3 × 99 =
33. 33.71 × 99 =
34. 34.91 × 99 =
35. 35.622 × 999 =
36. 36.3 × 9 =
37. 37.47 × 99 =
38. 38.763 × 999 =
39. 39.7 × 9 =
40. 40.61 × 99 =

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