Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 290 · 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. 1.1021 × 1030 =
2. 2.107 × 97 =
3. 3.92 × 91 =
4. 4.1013 × 1022 =
5. 5.8 × 8 =
6. 6.976 × 989 =
7. 7.7 × 8 =
8. 8.112 × 105 =
9. 9.12 × 7 =
10. 10.101 × 102 =
11. 11.103 × 115 =
12. 12.9 × 9 =
13. 13.968 × 964 =
14. 14.7 × 9 =
15. 15.984 × 960 =
16. 16.92 × 95 =
17. 17.1008 × 972 =
18. 18.7 × 7 =
19. 19.8 × 6 =
20. 20.102 × 112 =
21. 21.11 × 11 =
22. 22.1002 × 1037 =
23. 23.103 × 101 =
24. 24.95 × 89 =
25. 25.110 × 109 =
26. 26.105 × 88 =
27. 27.11 × 9 =
28. 28.13 × 11 =
29. 29.92 × 88 =
30. 30.997 × 986 =
31. 31.13 × 8 =
32. 32.90 × 98 =
33. 33.8 × 7 =
34. 34.8 × 9 =
35. 35.1026 × 1039 =
36. 36.9 × 6 =
37. 37.985 × 994 =
38. 38.93 × 96 =
39. 39.1012 × 983 =
40. 40.13 × 12 =

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