Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 681 · 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. 1.59 × 99 =
2. 2.2106 × 99 =
3. 3.7361 × 999 =
4. 4.308 × 999 =
5. 5.1002 × 99 =
6. 6.32 × 99 =
7. 7.34 × 99 =
8. 8.24376 × 999 =
9. 9.205 × 9 =
10. 10.27 × 99 =
11. 11.5 × 9 =
12. 12.5 × 9 =
13. 13.149 × 999 =
14. 14.91 × 999 =
15. 15.8 × 9 =
16. 16.2 × 99 =
17. 17.841 × 999 =
18. 18.29 × 999 =
19. 19.8 × 9 =
20. 20.13 × 99 =
21. 21.7 × 9 =
22. 22.36 × 99 =
23. 23.8 × 99 =
24. 24.221 × 999 =
25. 25.8 × 9 =
26. 26.567 × 999 =
27. 27.6 × 9 =
28. 28.1985 × 99 =
29. 29.31 × 99 =
30. 30.2 × 9 =
31. 31.104 × 99 =
32. 32.7 × 9 =
33. 33.905 × 999 =
34. 34.109 × 999 =
35. 35.8 × 9 =
36. 36.2 × 9 =
37. 37.8 × 9 =
38. 38.3 × 9 =
39. 39.58 × 99 =
40. 40.5 × 9 =

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