Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 973 · 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. 1.21 × 99 =
2. 2.158 × 99 =
3. 3.2 × 9 =
4. 4.976 × 999 =
5. 5.189 × 9 =
6. 6.17 × 99 =
7. 7.7 × 9 =
8. 8.73 × 9 =
9. 9.7 × 9 =
10. 10.65 × 99 =
11. 11.19 × 99 =
12. 12.621 × 999 =
13. 13.69 × 99 =
14. 14.182 × 999 =
15. 15.81 × 9 =
16. 16.9 × 99 =
17. 17.147 × 999 =
18. 18.74 × 999 =
19. 19.2544 × 99 =
20. 20.78 × 99 =
21. 21.2581 × 99 =
22. 22.24 × 999 =
23. 23.4 × 9 =
24. 24.2594 × 99 =
25. 25.128 × 999 =
26. 26.705 × 99 =
27. 27.763 × 999 =
28. 28.6 × 9 =
29. 29.36 × 99 =
30. 30.18 × 99 =
31. 31.1623 × 99 =
32. 32.516 × 999 =
33. 33.1652 × 99 =
34. 34.75 × 99 =
35. 35.6 × 9 =
36. 36.62 × 99 =
37. 37.404 × 99 =
38. 38.179 × 9 =
39. 39.1359 × 99 =
40. 40.93 × 99 =

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