Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 42 · 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. 1.101 × 104 =
2. 2.109 × 104 =
3. 3.112 × 107 =
4. 4.97 × 97 =
5. 5.14 × 8 =
6. 6.990 × 985 =
7. 7.1013 × 963 =
8. 8.113 × 88 =
9. 9.9 × 9 =
10. 10.94 × 93 =
11. 11.99 × 85 =
12. 12.92 × 90 =
13. 13.87 × 89 =
14. 14.93 × 98 =
15. 15.92 × 97 =
16. 16.1008 × 1004 =
17. 17.87 × 85 =
18. 18.99 × 92 =
19. 19.1007 × 999 =
20. 20.111 × 97 =
21. 21.1002 × 1040 =
22. 22.12 × 8 =
23. 23.104 × 102 =
24. 24.999 × 977 =
25. 25.85 × 86 =
26. 26.12 × 11 =
27. 27.1024 × 998 =
28. 28.105 × 112 =
29. 29.106 × 106 =
30. 30.107 × 103 =
31. 31.990 × 974 =
32. 32.101 × 113 =
33. 33.86 × 85 =
34. 34.113 × 112 =
35. 35.94 × 87 =
36. 36.1006 × 1038 =
37. 37.114 × 102 =
38. 38.91 × 97 =
39. 39.97 × 91 =
40. 40.7 × 7 =

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