Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 823 · 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. 1.97 × 98 =
2. 2.105 × 106 =
3. 3.1028 × 1012 =
4. 4.113 × 115 =
5. 5.13 × 6 =
6. 6.1012 × 1024 =
7. 7.94 × 88 =
8. 8.12 × 11 =
9. 9.99 × 89 =
10. 10.107 × 101 =
11. 11.6 × 8 =
12. 12.105 × 85 =
13. 13.86 × 89 =
14. 14.14 × 9 =
15. 15.110 × 108 =
16. 16.87 × 89 =
17. 17.90 × 98 =
18. 18.12 × 7 =
19. 19.112 × 106 =
20. 20.1038 × 981 =
21. 21.12 × 6 =
22. 22.11 × 9 =
23. 23.85 × 87 =
24. 24.104 × 89 =
25. 25.7 × 9 =
26. 26.94 × 95 =
27. 27.89 × 93 =
28. 28.11 × 14 =
29. 29.102 × 105 =
30. 30.1034 × 1025 =
31. 31.1020 × 1017 =
32. 32.1012 × 1037 =
33. 33.7 × 6 =
34. 34.1001 × 1015 =
35. 35.96 × 98 =
36. 36.11 × 9 =
37. 37.85 × 94 =
38. 38.11 × 11 =
39. 39.111 × 85 =
40. 40.1016 × 1011 =

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