Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 279 · 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. 1.6 × 9 =
2. 2.104 × 110 =
3. 3.97 × 98 =
4. 4.9 × 8 =
5. 5.1010 × 1015 =
6. 6.1008 × 1013 =
7. 7.86 × 91 =
8. 8.93 × 87 =
9. 9.89 × 94 =
10. 10.969 × 961 =
11. 11.99 × 99 =
12. 12.11 × 13 =
13. 13.109 × 109 =
14. 14.103 × 94 =
15. 15.1004 × 1028 =
16. 16.7 × 6 =
17. 17.109 × 87 =
18. 18.11 × 14 =
19. 19.108 × 88 =
20. 20.972 × 965 =
21. 21.109 × 88 =
22. 22.110 × 105 =
23. 23.1026 × 1024 =
24. 24.13 × 13 =
25. 25.87 × 97 =
26. 26.13 × 8 =
27. 27.6 × 6 =
28. 28.9 × 6 =
29. 29.1009 × 1027 =
30. 30.99 × 95 =
31. 31.111 × 102 =
32. 32.995 × 991 =
33. 33.1007 × 977 =
34. 34.101 × 95 =
35. 35.107 × 108 =
36. 36.109 × 115 =
37. 37.1004 × 964 =
38. 38.115 × 109 =
39. 39.94 × 87 =
40. 40.8 × 8 =

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