Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 90 · 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 × 6 =
2. 2.8 × 6 =
3. 3.6 × 7 =
4. 4.1038 × 1010 =
5. 5.11 × 14 =
6. 6.101 × 107 =
7. 7.999 × 974 =
8. 8.108 × 105 =
9. 9.9 × 8 =
10. 10.14 × 6 =
11. 11.114 × 102 =
12. 12.92 × 88 =
13. 13.1005 × 995 =
14. 14.108 × 102 =
15. 15.1016 × 975 =
16. 16.101 × 94 =
17. 17.1022 × 962 =
18. 18.1037 × 996 =
19. 19.982 × 967 =
20. 20.107 × 87 =
21. 21.114 × 85 =
22. 22.14 × 12 =
23. 23.9 × 7 =
24. 24.11 × 13 =
25. 25.115 × 97 =
26. 26.104 × 105 =
27. 27.13 × 11 =
28. 28.8 × 6 =
29. 29.111 × 87 =
30. 30.86 × 92 =
31. 31.102 × 114 =
32. 32.87 × 90 =
33. 33.90 × 90 =
34. 34.1035 × 1027 =
35. 35.1025 × 1005 =
36. 36.109 × 102 =
37. 37.995 × 961 =
38. 38.13 × 8 =
39. 39.1026 × 1018 =
40. 40.114 × 104 =

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