Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 160 · 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. 1.21 × 99 =
2. 2.31 × 99 =
3. 3.76 × 99 =
4. 4.151 × 999 =
5. 5.37 × 9 =
6. 6.575 × 99 =
7. 7.154 × 9 =
8. 8.224 × 9 =
9. 9.337 × 999 =
10. 10.662 × 999 =
11. 11.6 × 9 =
12. 12.5 × 9 =
13. 13.5 × 9 =
14. 14.7 × 9 =
15. 15.4 × 9 =
16. 16.4 × 9 =
17. 17.18754 × 999 =
18. 18.2772 × 99 =
19. 19.5 × 9 =
20. 20.21 × 99 =
21. 21.65 × 9 =
22. 22.42 × 99 =
23. 23.98 × 99 =
24. 24.24 × 99 =
25. 25.12 × 99 =
26. 26.8 × 9 =
27. 27.3 × 9 =
28. 28.1499 × 99 =
29. 29.89 × 99 =
30. 30.733 × 999 =
31. 31.7 × 9 =
32. 32.76 × 99 =
33. 33.2 × 9 =
34. 34.25 × 99 =
35. 35.687 × 999 =
36. 36.24 × 99 =
37. 37.847 × 999 =
38. 38.5 × 9 =
39. 39.8 × 9 =
40. 40.8 × 9 =

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