Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 68 · 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. 1.31 × 99 =
2. 2.72 × 99 =
3. 3.5 × 99 =
4. 4.171 × 9 =
5. 5.149 × 9 =
6. 6.48 × 99 =
7. 7.408 × 99 =
8. 8.42 × 99 =
9. 9.5 × 99 =
10. 10.615 × 999 =
11. 11.66 × 99 =
12. 12.13 × 9 =
13. 13.2517 × 99 =
14. 14.83 × 99 =
15. 15.65 × 99 =
16. 16.44 × 99 =
17. 17.8 × 9 =
18. 18.2451 × 99 =
19. 19.6 × 9 =
20. 20.1879 × 99 =
21. 21.71 × 99 =
22. 22.1097 × 99 =
23. 23.27 × 99 =
24. 24.2 × 9 =
25. 25.63 × 99 =
26. 26.43 × 99 =
27. 27.6761 × 999 =
28. 28.153 × 9 =
29. 29.29 × 9 =
30. 30.134 × 999 =
31. 31.2 × 9 =
32. 32.69 × 99 =
33. 33.3 × 9 =
34. 34.123 × 9 =
35. 35.2 × 99 =
36. 36.176 × 999 =
37. 37.91 × 9 =
38. 38.45 × 99 =
39. 39.6 × 9 =
40. 40.2921 × 99 =

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