Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 486 · 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. 1.1621 × 99 =
2. 2.99 × 9 =
3. 3.401 × 999 =
4. 4.4 × 9 =
5. 5.91 × 9 =
6. 6.7 × 9 =
7. 7.673 × 999 =
8. 8.5 × 9 =
9. 9.28928 × 999 =
10. 10.3 × 9 =
11. 11.48 × 99 =
12. 12.2 × 9 =
13. 13.1431 × 99 =
14. 14.93 × 99 =
15. 15.1324 × 99 =
16. 16.76 × 999 =
17. 17.7 × 9 =
18. 18.93 × 99 =
19. 19.3 × 9 =
20. 20.18 × 99 =
21. 21.163 × 9 =
22. 22.3 × 9 =
23. 23.18188 × 999 =
24. 24.6302 × 999 =
25. 25.21 × 99 =
26. 26.45 × 9 =
27. 27.2957 × 99 =
28. 28.19901 × 999 =
29. 29.25 × 99 =
30. 30.413 × 999 =
31. 31.24824 × 999 =
32. 32.87 × 99 =
33. 33.951 × 99 =
34. 34.488 × 999 =
35. 35.15685 × 999 =
36. 36.7 × 9 =
37. 37.51 × 999 =
38. 38.59 × 99 =
39. 39.6 × 9 =
40. 40.907 × 99 =

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