Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 153 · 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. 1.63 × 99 =
2. 2.77 × 99 =
3. 3.5 × 99 =
4. 4.26 × 99 =
5. 5.19834 × 999 =
6. 6.5 × 9 =
7. 7.7363 × 999 =
8. 8.4 × 9 =
9. 9.5 × 9 =
10. 10.185 × 999 =
11. 11.168 × 999 =
12. 12.23174 × 999 =
13. 13.966 × 999 =
14. 14.2 × 9 =
15. 15.3 × 9 =
16. 16.2 × 9 =
17. 17.42 × 99 =
18. 18.729 × 999 =
19. 19.87 × 99 =
20. 20.24 × 99 =
21. 21.12 × 99 =
22. 22.186 × 999 =
23. 23.61 × 99 =
24. 24.4 × 9 =
25. 25.551 × 999 =
26. 26.3 × 9 =
27. 27.1108 × 99 =
28. 28.7 × 999 =
29. 29.4 × 9 =
30. 30.8 × 99 =
31. 31.36 × 99 =
32. 32.24624 × 999 =
33. 33.23 × 9 =
34. 34.84 × 99 =
35. 35.197 × 99 =
36. 36.169 × 9 =
37. 37.435 × 999 =
38. 38.32 × 99 =
39. 39.85 × 9 =
40. 40.23 × 9 =

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