Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 281 · 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. 1.98 × 97 =
2. 2.101 × 99 =
3. 3.90 × 88 =
4. 4.99 × 85 =
5. 5.95 × 94 =
6. 6.12 × 7 =
7. 7.90 × 92 =
8. 8.85 × 90 =
9. 9.92 × 88 =
10. 10.90 × 90 =
11. 11.1017 × 1009 =
12. 12.86 × 93 =
13. 13.1020 × 965 =
14. 14.110 × 92 =
15. 15.92 × 92 =
16. 16.991 × 978 =
17. 17.1019 × 1022 =
18. 18.6 × 8 =
19. 19.7 × 9 =
20. 20.98 × 97 =
21. 21.7 × 9 =
22. 22.8 × 9 =
23. 23.14 × 6 =
24. 24.92 × 95 =
25. 25.1028 × 1005 =
26. 26.12 × 13 =
27. 27.99 × 92 =
28. 28.1021 × 1011 =
29. 29.983 × 987 =
30. 30.9 × 6 =
31. 31.9 × 9 =
32. 32.104 × 108 =
33. 33.967 × 989 =
34. 34.12 × 9 =
35. 35.106 × 101 =
36. 36.12 × 13 =
37. 37.8 × 8 =
38. 38.106 × 86 =
39. 39.112 × 113 =
40. 40.87 × 85 =

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