Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 641 · 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. 1.66 × 99 =
2. 2.23092 × 999 =
3. 3.6 × 9 =
4. 4.17 × 99 =
5. 5.169 × 9 =
6. 6.5 × 9 =
7. 7.2 × 9 =
8. 8.57 × 99 =
9. 9.91 × 99 =
10. 10.3 × 9 =
11. 11.4 × 9 =
12. 12.7 × 9 =
13. 13.7348 × 999 =
14. 14.1099 × 99 =
15. 15.248 × 9 =
16. 16.4 × 9 =
17. 17.9 × 99 =
18. 18.67 × 99 =
19. 19.71 × 999 =
20. 20.37 × 99 =
21. 21.11 × 99 =
22. 22.1511 × 99 =
23. 23.119 × 9 =
24. 24.39 × 99 =
25. 25.776 × 999 =
26. 26.711 × 99 =
27. 27.522 × 999 =
28. 28.3 × 9 =
29. 29.54 × 9 =
30. 30.221 × 9 =
31. 31.555 × 999 =
32. 32.5 × 9 =
33. 33.22 × 99 =
34. 34.71 × 99 =
35. 35.1826 × 99 =
36. 36.128 × 9 =
37. 37.852 × 99 =
38. 38.98 × 9 =
39. 39.58 × 99 =
40. 40.2831 × 99 =

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