Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 429 · 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. 1.71 × 999 =
2. 2.67 × 99 =
3. 3.155 × 9 =
4. 4.22 × 99 =
5. 5.53 × 9 =
6. 6.44 × 99 =
7. 7.2 × 9 =
8. 8.8 × 9 =
9. 9.718 × 99 =
10. 10.89 × 99 =
11. 11.2 × 9 =
12. 12.1391 × 99 =
13. 13.33 × 99 =
14. 14.1562 × 999 =
15. 15.91 × 99 =
16. 16.6 × 9 =
17. 17.57 × 9 =
18. 18.3 × 99 =
19. 19.3731 × 999 =
20. 20.14 × 99 =
21. 21.183 × 999 =
22. 22.212 × 9 =
23. 23.202 × 999 =
24. 24.3 × 9 =
25. 25.4 × 9 =
26. 26.5 × 9 =
27. 27.51 × 9 =
28. 28.3 × 9 =
29. 29.3 × 9 =
30. 30.71 × 9 =
31. 31.76 × 99 =
32. 32.71 × 99 =
33. 33.107 × 9 =
34. 34.8 × 9 =
35. 35.499 × 999 =
36. 36.904 × 999 =
37. 37.566 × 999 =
38. 38.7 × 99 =
39. 39.328 × 999 =
40. 40.2 × 9 =

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