Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 405 · 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. 1.1008 × 1017 =
2. 2.980 × 960 =
3. 3.13 × 11 =
4. 4.113 × 96 =
5. 5.86 × 90 =
6. 6.93 × 97 =
7. 7.112 × 107 =
8. 8.1025 × 990 =
9. 9.11 × 12 =
10. 10.113 × 106 =
11. 11.107 × 93 =
12. 12.9 × 7 =
13. 13.13 × 6 =
14. 14.1011 × 1002 =
15. 15.11 × 6 =
16. 16.11 × 14 =
17. 17.85 × 99 =
18. 18.992 × 992 =
19. 19.9 × 7 =
20. 20.89 × 95 =
21. 21.104 × 102 =
22. 22.87 × 96 =
23. 23.14 × 11 =
24. 24.12 × 13 =
25. 25.96 × 95 =
26. 26.111 × 96 =
27. 27.14 × 8 =
28. 28.85 × 90 =
29. 29.7 × 8 =
30. 30.12 × 7 =
31. 31.14 × 11 =
32. 32.6 × 9 =
33. 33.1008 × 988 =
34. 34.110 × 108 =
35. 35.107 × 86 =
36. 36.9 × 7 =
37. 37.1038 × 1016 =
38. 38.1010 × 961 =
39. 39.1033 × 1016 =
40. 40.103 × 114 =

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