Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 25 · 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. 1.99 × 97 =
2. 2.8 × 6 =
3. 3.108 × 95 =
4. 4.110 × 111 =
5. 5.114 × 92 =
6. 6.1002 × 1008 =
7. 7.92 × 86 =
8. 8.9 × 9 =
9. 9.8 × 7 =
10. 10.967 × 977 =
11. 11.109 × 103 =
12. 12.107 × 90 =
13. 13.1004 × 962 =
14. 14.12 × 11 =
15. 15.14 × 13 =
16. 16.90 × 91 =
17. 17.96 × 91 =
18. 18.6 × 7 =
19. 19.8 × 8 =
20. 20.96 × 92 =
21. 21.92 × 94 =
22. 22.97 × 98 =
23. 23.1015 × 1017 =
24. 24.6 × 8 =
25. 25.114 × 85 =
26. 26.102 × 91 =
27. 27.984 × 962 =
28. 28.113 × 102 =
29. 29.14 × 11 =
30. 30.961 × 985 =
31. 31.97 × 88 =
32. 32.107 × 107 =
33. 33.93 × 87 =
34. 34.107 × 92 =
35. 35.110 × 96 =
36. 36.105 × 94 =
37. 37.8 × 6 =
38. 38.91 × 85 =
39. 39.111 × 105 =
40. 40.107 × 109 =

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