Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 521 · 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. 1.57 × 99 =
2. 2.4 × 9 =
3. 3.639 × 999 =
4. 4.85 × 9 =
5. 5.109 × 9 =
6. 6.63 × 99 =
7. 7.658 × 999 =
8. 8.5 × 9 =
9. 9.8 × 9 =
10. 10.54 × 9 =
11. 11.122 × 9 =
12. 12.92 × 99 =
13. 13.8 × 9 =
14. 14.339 × 999 =
15. 15.7 × 9 =
16. 16.489 × 999 =
17. 17.2 × 9 =
18. 18.2 × 9 =
19. 19.1227 × 99 =
20. 20.2 × 9 =
21. 21.3 × 9 =
22. 22.341 × 999 =
23. 23.3 × 9 =
24. 24.15 × 99 =
25. 25.32 × 99 =
26. 26.49 × 99 =
27. 27.663 × 999 =
28. 28.736 × 999 =
29. 29.5 × 9 =
30. 30.37 × 99 =
31. 31.21474 × 999 =
32. 32.71 × 999 =
33. 33.7097 × 999 =
34. 34.6 × 9 =
35. 35.62 × 99 =
36. 36.78 × 99 =
37. 37.75 × 9 =
38. 38.106 × 9 =
39. 39.57 × 99 =
40. 40.4 × 9 =

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