Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 204 · 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. 1.1005 × 1016 =
2. 2.1014 × 1039 =
3. 3.14 × 12 =
4. 4.109 × 108 =
5. 5.91 × 97 =
6. 6.11 × 11 =
7. 7.1013 × 975 =
8. 8.11 × 8 =
9. 9.1038 × 1010 =
10. 10.97 × 88 =
11. 11.106 × 114 =
12. 12.6 × 8 =
13. 13.11 × 7 =
14. 14.96 × 86 =
15. 15.97 × 92 =
16. 16.105 × 102 =
17. 17.97 × 85 =
18. 18.11 × 11 =
19. 19.14 × 7 =
20. 20.12 × 9 =
21. 21.11 × 7 =
22. 22.14 × 9 =
23. 23.96 × 87 =
24. 24.1040 × 1004 =
25. 25.106 × 85 =
26. 26.91 × 92 =
27. 27.107 × 111 =
28. 28.1021 × 999 =
29. 29.1032 × 1001 =
30. 30.95 × 96 =
31. 31.111 × 91 =
32. 32.9 × 8 =
33. 33.6 × 7 =
34. 34.110 × 90 =
35. 35.11 × 8 =
36. 36.92 × 94 =
37. 37.1038 × 1037 =
38. 38.112 × 106 =
39. 39.103 × 108 =
40. 40.85 × 99 =

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