Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 732 · 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. 1.1010 × 999 =
2. 2.12 × 14 =
3. 3.12 × 8 =
4. 4.1021 × 1020 =
5. 5.102 × 103 =
6. 6.107 × 103 =
7. 7.96 × 98 =
8. 8.93 × 89 =
9. 9.6 × 9 =
10. 10.7 × 8 =
11. 11.114 × 92 =
12. 12.102 × 113 =
13. 13.101 × 97 =
14. 14.95 × 90 =
15. 15.993 × 960 =
16. 16.103 × 103 =
17. 17.9 × 7 =
18. 18.1030 × 1017 =
19. 19.97 × 95 =
20. 20.8 × 6 =
21. 21.101 × 93 =
22. 22.968 × 995 =
23. 23.7 × 7 =
24. 24.977 × 977 =
25. 25.87 × 87 =
26. 26.87 × 92 =
27. 27.90 × 90 =
28. 28.11 × 8 =
29. 29.1022 × 1006 =
30. 30.11 × 13 =
31. 31.13 × 14 =
32. 32.9 × 8 =
33. 33.107 × 96 =
34. 34.112 × 89 =
35. 35.1034 × 985 =
36. 36.7 × 6 =
37. 37.113 × 114 =
38. 38.14 × 9 =
39. 39.86 × 93 =
40. 40.111 × 89 =

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