Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 184 · 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. 1.73 × 99 =
2. 2.219 × 99 =
3. 3.4 × 9 =
4. 4.6 × 9 =
5. 5.468 × 999 =
6. 6.69 × 99 =
7. 7.2 × 9 =
8. 8.2709 × 99 =
9. 9.1731 × 99 =
10. 10.2 × 9 =
11. 11.6 × 9 =
12. 12.21 × 99 =
13. 13.3 × 9 =
14. 14.285 × 999 =
15. 15.2 × 9 =
16. 16.41 × 99 =
17. 17.96 × 99 =
18. 18.2131 × 99 =
19. 19.2 × 9 =
20. 20.66 × 99 =
21. 21.59 × 99 =
22. 22.5 × 9 =
23. 23.545 × 999 =
24. 24.144 × 9 =
25. 25.24579 × 999 =
26. 26.218 × 999 =
27. 27.706 × 999 =
28. 28.24 × 99 =
29. 29.8 × 9 =
30. 30.97 × 99 =
31. 31.85 × 99 =
32. 32.63 × 99 =
33. 33.681 × 999 =
34. 34.2 × 9 =
35. 35.98 × 99 =
36. 36.7 × 9 =
37. 37.12071 × 999 =
38. 38.2887 × 99 =
39. 39.6837 × 999 =
40. 40.11 × 99 =

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