Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 6 · 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. 1.22 × 99 =
2. 2.39 × 99 =
3. 3.31 × 99 =
4. 4.5 × 9 =
5. 5.161 × 9 =
6. 6.939 × 999 =
7. 7.722 × 999 =
8. 8.468 × 999 =
9. 9.7 × 9 =
10. 10.25043 × 999 =
11. 11.96 × 99 =
12. 12.865 × 999 =
13. 13.41 × 99 =
14. 14.2246 × 99 =
15. 15.65 × 99 =
16. 16.59 × 99 =
17. 17.356 × 99 =
18. 18.172 × 9 =
19. 19.71 × 99 =
20. 20.58 × 99 =
21. 21.86 × 99 =
22. 22.96 × 99 =
23. 23.12 × 999 =
24. 24.55 × 99 =
25. 25.2348 × 99 =
26. 26.83 × 99 =
27. 27.746 × 999 =
28. 28.15 × 99 =
29. 29.21 × 999 =
30. 30.11 × 99 =
31. 31.8 × 9 =
32. 32.61 × 9 =
33. 33.18079 × 999 =
34. 34.112 × 9 =
35. 35.82 × 99 =
36. 36.51 × 9 =
37. 37.19612 × 999 =
38. 38.956 × 999 =
39. 39.65 × 99 =
40. 40.224 × 9 =

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