Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 637 · 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. 1.78 × 99 =
2. 2.2 × 99 =
3. 3.6 × 9 =
4. 4.75 × 99 =
5. 5.131 × 999 =
6. 6.8 × 99 =
7. 7.8511 × 999 =
8. 8.647 × 99 =
9. 9.73 × 999 =
10. 10.3 × 9 =
11. 11.684 × 999 =
12. 12.305 × 999 =
13. 13.45 × 99 =
14. 14.122 × 999 =
15. 15.75 × 9 =
16. 16.235 × 9 =
17. 17.4 × 9 =
18. 18.4 × 9 =
19. 19.67 × 999 =
20. 20.6 × 9 =
21. 21.173 × 9 =
22. 22.98 × 9 =
23. 23.94 × 99 =
24. 24.25 × 99 =
25. 25.8 × 9 =
26. 26.4 × 9 =
27. 27.53 × 99 =
28. 28.3394 × 999 =
29. 29.3 × 9 =
30. 30.99 × 9 =
31. 31.16 × 99 =
32. 32.5 × 99 =
33. 33.6 × 9 =
34. 34.7797 × 999 =
35. 35.2 × 9 =
36. 36.6 × 9 =
37. 37.129 × 9 =
38. 38.6 × 9 =
39. 39.812 × 999 =
40. 40.81 × 9 =

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