Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 868 · 40 sums

The trick (Nikhilam Navatashcaramam Dashatah): Write how far each number is from the base (− if below, + if above). Left part: cross-add — one number plus the other’s difference. Right part: multiply the two differences; it must have as many digits as the base has zeros (carry the extra). One above and one below? The right part is negative: take 1 from the left part and write base − that amount.

1. 1.8 × 9 =
2. 2.86 × 98 =
3. 3.1034 × 1020 =
4. 4.1008 × 966 =
5. 5.104 × 108 =
6. 6.1029 × 1010 =
7. 7.1004 × 979 =
8. 8.13 × 12 =
9. 9.11 × 11 =
10. 10.1007 × 1039 =
11. 11.87 × 91 =
12. 12.101 × 105 =
13. 13.111 × 109 =
14. 14.11 × 14 =
15. 15.115 × 113 =
16. 16.6 × 8 =
17. 17.9 × 9 =
18. 18.8 × 8 =
19. 19.108 × 99 =
20. 20.11 × 11 =
21. 21.86 × 99 =
22. 22.102 × 89 =
23. 23.9 × 6 =
24. 24.113 × 85 =
25. 25.105 × 103 =
26. 26.1007 × 1018 =
27. 27.8 × 6 =
28. 28.104 × 110 =
29. 29.1008 × 1009 =
30. 30.13 × 8 =
31. 31.86 × 87 =
32. 32.12 × 8 =
33. 33.107 × 95 =
34. 34.111 × 87 =
35. 35.101 × 85 =
36. 36.104 × 96 =
37. 37.109 × 97 =
38. 38.9 × 9 =
39. 39.1032 × 1026 =
40. 40.87 × 96 =

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