Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 791 · 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. 1.44 × 99 =
2. 2.478 × 99 =
3. 3.5 × 9 =
4. 4.34 × 99 =
5. 5.724 × 999 =
6. 6.288 × 999 =
7. 7.2774 × 99 =
8. 8.955 × 999 =
9. 9.223 × 9 =
10. 10.5 × 9 =
11. 11.173 × 9 =
12. 12.152 × 9 =
13. 13.226 × 9 =
14. 14.13299 × 999 =
15. 15.35 × 99 =
16. 16.79 × 99 =
17. 17.27666 × 999 =
18. 18.98 × 99 =
19. 19.173 × 999 =
20. 20.42 × 99 =
21. 21.8 × 9 =
22. 22.774 × 999 =
23. 23.124 × 999 =
24. 24.56 × 9 =
25. 25.75 × 99 =
26. 26.108 × 999 =
27. 27.166 × 999 =
28. 28.1697 × 99 =
29. 29.67 × 99 =
30. 30.419 × 99 =
31. 31.8 × 99 =
32. 32.29 × 9 =
33. 33.2268 × 99 =
34. 34.5 × 9 =
35. 35.19 × 99 =
36. 36.9 × 99 =
37. 37.145 × 9 =
38. 38.11 × 99 =
39. 39.452 × 99 =
40. 40.5 × 9 =

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