Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 883 · 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. 1.1016 × 1021 =
2. 2.991 × 997 =
3. 3.6 × 9 =
4. 4.110 × 110 =
5. 5.106 × 109 =
6. 6.9 × 8 =
7. 7.99 × 95 =
8. 8.11 × 12 =
9. 9.9 × 7 =
10. 10.113 × 101 =
11. 11.86 × 93 =
12. 12.13 × 13 =
13. 13.11 × 13 =
14. 14.99 × 96 =
15. 15.13 × 7 =
16. 16.110 × 88 =
17. 17.13 × 9 =
18. 18.98 × 98 =
19. 19.13 × 6 =
20. 20.102 × 89 =
21. 21.1024 × 1015 =
22. 22.94 × 87 =
23. 23.103 × 89 =
24. 24.105 × 97 =
25. 25.96 × 93 =
26. 26.14 × 12 =
27. 27.90 × 96 =
28. 28.13 × 11 =
29. 29.91 × 94 =
30. 30.996 × 969 =
31. 31.9 × 8 =
32. 32.12 × 11 =
33. 33.114 × 90 =
34. 34.979 × 979 =
35. 35.6 × 9 =
36. 36.11 × 13 =
37. 37.88 × 88 =
38. 38.88 × 91 =
39. 39.994 × 983 =
40. 40.11 × 9 =

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