Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 268 · 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. 1.1018 × 1032 =
2. 2.104 × 102 =
3. 3.115 × 113 =
4. 4.1003 × 1033 =
5. 5.103 × 86 =
6. 6.107 × 112 =
7. 7.988 × 998 =
8. 8.110 × 101 =
9. 9.108 × 109 =
10. 10.6 × 7 =
11. 11.1003 × 964 =
12. 12.87 × 89 =
13. 13.12 × 11 =
14. 14.12 × 11 =
15. 15.108 × 105 =
16. 16.1010 × 1034 =
17. 17.107 × 91 =
18. 18.99 × 97 =
19. 19.107 × 86 =
20. 20.961 × 968 =
21. 21.11 × 6 =
22. 22.86 × 87 =
23. 23.111 × 87 =
24. 24.6 × 6 =
25. 25.115 × 91 =
26. 26.9 × 7 =
27. 27.112 × 103 =
28. 28.102 × 107 =
29. 29.984 × 982 =
30. 30.114 × 109 =
31. 31.14 × 13 =
32. 32.111 × 92 =
33. 33.103 × 102 =
34. 34.90 × 94 =
35. 35.85 × 95 =
36. 36.1039 × 1030 =
37. 37.104 × 92 =
38. 38.8 × 7 =
39. 39.1017 × 1021 =
40. 40.985 × 982 =

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