Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 599 · 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. 1.172 × 9 =
2. 2.87 × 99 =
3. 3.3 × 9 =
4. 4.2 × 9 =
5. 5.8 × 9 =
6. 6.2 × 9 =
7. 7.334 × 999 =
8. 8.7 × 9 =
9. 9.2 × 9 =
10. 10.18384 × 999 =
11. 11.508 × 999 =
12. 12.68 × 99 =
13. 13.4 × 9 =
14. 14.172 × 999 =
15. 15.37 × 999 =
16. 16.82 × 99 =
17. 17.5 × 9 =
18. 18.2889 × 99 =
19. 19.8 × 9 =
20. 20.88 × 999 =
21. 21.67 × 99 =
22. 22.5 × 9 =
23. 23.2671 × 99 =
24. 24.11 × 999 =
25. 25.69 × 999 =
26. 26.1115 × 99 =
27. 27.143 × 999 =
28. 28.8 × 9 =
29. 29.113 × 9 =
30. 30.56 × 99 =
31. 31.549 × 999 =
32. 32.416 × 999 =
33. 33.31 × 99 =
34. 34.72 × 9 =
35. 35.2 × 9 =
36. 36.2 × 9 =
37. 37.8 × 9 =
38. 38.3 × 9 =
39. 39.321 × 999 =
40. 40.416 × 999 =

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