Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 257 · 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. 1.1020 × 1024 =
2. 2.97 × 90 =
3. 3.1037 × 985 =
4. 4.8 × 7 =
5. 5.85 × 99 =
6. 6.9 × 9 =
7. 7.96 × 98 =
8. 8.97 × 99 =
9. 9.1008 × 972 =
10. 10.8 × 7 =
11. 11.1006 × 1006 =
12. 12.8 × 7 =
13. 13.96 × 91 =
14. 14.965 × 982 =
15. 15.978 × 962 =
16. 16.11 × 6 =
17. 17.106 × 101 =
18. 18.106 × 107 =
19. 19.973 × 961 =
20. 20.86 × 94 =
21. 21.111 × 104 =
22. 22.93 × 89 =
23. 23.88 × 99 =
24. 24.90 × 86 =
25. 25.7 × 9 =
26. 26.93 × 98 =
27. 27.975 × 998 =
28. 28.109 × 105 =
29. 29.103 × 104 =
30. 30.112 × 105 =
31. 31.9 × 6 =
32. 32.1017 × 1012 =
33. 33.6 × 8 =
34. 34.1039 × 967 =
35. 35.111 × 103 =
36. 36.975 × 986 =
37. 37.985 × 963 =
38. 38.89 × 98 =
39. 39.13 × 12 =
40. 40.101 × 99 =

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