Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 415 · 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. 1.1018 × 1012 =
2. 2.107 × 115 =
3. 3.101 × 113 =
4. 4.1038 × 1030 =
5. 5.99 × 85 =
6. 6.102 × 114 =
7. 7.9 × 7 =
8. 8.96 × 97 =
9. 9.990 × 999 =
10. 10.104 × 115 =
11. 11.88 × 95 =
12. 12.11 × 8 =
13. 13.94 × 89 =
14. 14.87 × 99 =
15. 15.11 × 13 =
16. 16.96 × 94 =
17. 17.9 × 9 =
18. 18.113 × 109 =
19. 19.97 × 94 =
20. 20.973 × 974 =
21. 21.92 × 97 =
22. 22.1019 × 1024 =
23. 23.14 × 7 =
24. 24.110 × 111 =
25. 25.11 × 7 =
26. 26.8 × 6 =
27. 27.89 × 93 =
28. 28.8 × 9 =
29. 29.13 × 7 =
30. 30.14 × 9 =
31. 31.1002 × 1035 =
32. 32.102 × 104 =
33. 33.113 × 104 =
34. 34.94 × 93 =
35. 35.999 × 990 =
36. 36.107 × 89 =
37. 37.11 × 9 =
38. 38.113 × 113 =
39. 39.99 × 89 =
40. 40.115 × 113 =

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