Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 287 · 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. 1.11 × 11 =
2. 2.102 × 102 =
3. 3.12 × 12 =
4. 4.101 × 101 =
5. 5.86 × 93 =
6. 6.11 × 9 =
7. 7.104 × 108 =
8. 8.103 × 107 =
9. 9.103 × 88 =
10. 10.1013 × 1039 =
11. 11.106 × 113 =
12. 12.89 × 86 =
13. 13.1036 × 1012 =
14. 14.109 × 95 =
15. 15.1022 × 999 =
16. 16.101 × 92 =
17. 17.9 × 8 =
18. 18.8 × 9 =
19. 19.99 × 99 =
20. 20.105 × 108 =
21. 21.9 × 6 =
22. 22.1008 × 1030 =
23. 23.106 × 101 =
24. 24.11 × 11 =
25. 25.108 × 95 =
26. 26.110 × 108 =
27. 27.8 × 7 =
28. 28.11 × 6 =
29. 29.115 × 99 =
30. 30.105 × 97 =
31. 31.971 × 965 =
32. 32.12 × 12 =
33. 33.982 × 989 =
34. 34.107 × 92 =
35. 35.101 × 102 =
36. 36.114 × 96 =
37. 37.107 × 98 =
38. 38.1022 × 1029 =
39. 39.85 × 90 =
40. 40.111 × 102 =

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