Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 231 · 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. 1.90 × 89 =
2. 2.1024 × 1022 =
3. 3.12 × 12 =
4. 4.98 × 86 =
5. 5.6 × 7 =
6. 6.114 × 110 =
7. 7.991 × 975 =
8. 8.12 × 7 =
9. 9.98 × 98 =
10. 10.1018 × 1011 =
11. 11.87 × 91 =
12. 12.102 × 110 =
13. 13.12 × 12 =
14. 14.96 × 85 =
15. 15.7 × 8 =
16. 16.997 × 974 =
17. 17.103 × 110 =
18. 18.107 × 101 =
19. 19.101 × 102 =
20. 20.6 × 7 =
21. 21.91 × 86 =
22. 22.99 × 99 =
23. 23.1030 × 1032 =
24. 24.965 × 978 =
25. 25.113 × 109 =
26. 26.6 × 9 =
27. 27.14 × 14 =
28. 28.8 × 9 =
29. 29.6 × 8 =
30. 30.13 × 6 =
31. 31.9 × 6 =
32. 32.103 × 109 =
33. 33.86 × 93 =
34. 34.85 × 86 =
35. 35.1024 × 1004 =
36. 36.115 × 98 =
37. 37.114 × 109 =
38. 38.111 × 111 =
39. 39.975 × 994 =
40. 40.86 × 94 =

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