Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 431 · 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. 1.103 × 104 =
2. 2.14 × 14 =
3. 3.105 × 96 =
4. 4.102 × 108 =
5. 5.982 × 991 =
6. 6.1029 × 1009 =
7. 7.11 × 12 =
8. 8.1006 × 988 =
9. 9.1030 × 966 =
10. 10.11 × 13 =
11. 11.12 × 8 =
12. 12.988 × 980 =
13. 13.104 × 108 =
14. 14.115 × 89 =
15. 15.1036 × 1012 =
16. 16.102 × 98 =
17. 17.107 × 113 =
18. 18.1039 × 1006 =
19. 19.88 × 86 =
20. 20.9 × 9 =
21. 21.12 × 14 =
22. 22.99 × 96 =
23. 23.9 × 7 =
24. 24.95 × 89 =
25. 25.9 × 9 =
26. 26.13 × 13 =
27. 27.113 × 112 =
28. 28.103 × 112 =
29. 29.970 × 998 =
30. 30.89 × 99 =
31. 31.114 × 108 =
32. 32.9 × 7 =
33. 33.91 × 91 =
34. 34.106 × 103 =
35. 35.1007 × 1017 =
36. 36.1022 × 1036 =
37. 37.6 × 7 =
38. 38.6 × 7 =
39. 39.9 × 6 =
40. 40.9 × 9 =

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