Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 166 · 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. 1.91 × 99 =
2. 2.256 × 9 =
3. 3.304 × 999 =
4. 4.33 × 99 =
5. 5.2 × 9 =
6. 6.14 × 99 =
7. 7.7 × 9 =
8. 8.931 × 99 =
9. 9.1293 × 999 =
10. 10.51 × 99 =
11. 11.36 × 9 =
12. 12.234 × 9 =
13. 13.439 × 99 =
14. 14.4 × 9 =
15. 15.936 × 999 =
16. 16.17379 × 999 =
17. 17.61 × 99 =
18. 18.78 × 99 =
19. 19.28 × 99 =
20. 20.223 × 9 =
21. 21.6 × 9 =
22. 22.92 × 99 =
23. 23.3 × 9 =
24. 24.1909 × 99 =
25. 25.74 × 999 =
26. 26.261 × 9 =
27. 27.206 × 9 =
28. 28.3 × 9 =
29. 29.23255 × 999 =
30. 30.501 × 999 =
31. 31.451 × 999 =
32. 32.472 × 999 =
33. 33.641 × 999 =
34. 34.78 × 99 =
35. 35.191 × 9 =
36. 36.314 × 999 =
37. 37.13 × 99 =
38. 38.3 × 9 =
39. 39.881 × 999 =
40. 40.4 × 9 =

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