Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 454 · 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. 1.115 × 104 =
2. 2.90 × 89 =
3. 3.7 × 9 =
4. 4.964 × 996 =
5. 5.1022 × 1018 =
6. 6.11 × 6 =
7. 7.104 × 107 =
8. 8.1027 × 1037 =
9. 9.112 × 105 =
10. 10.12 × 9 =
11. 11.13 × 7 =
12. 12.1016 × 1037 =
13. 13.987 × 993 =
14. 14.108 × 104 =
15. 15.9 × 6 =
16. 16.1028 × 1002 =
17. 17.99 × 98 =
18. 18.86 × 91 =
19. 19.114 × 92 =
20. 20.1022 × 960 =
21. 21.109 × 85 =
22. 22.91 × 98 =
23. 23.11 × 9 =
24. 24.1009 × 1038 =
25. 25.7 × 9 =
26. 26.12 × 6 =
27. 27.1007 × 990 =
28. 28.967 × 973 =
29. 29.101 × 102 =
30. 30.1005 × 1014 =
31. 31.1014 × 1001 =
32. 32.90 × 90 =
33. 33.975 × 961 =
34. 34.97 × 92 =
35. 35.1021 × 974 =
36. 36.85 × 93 =
37. 37.1003 × 987 =
38. 38.87 × 90 =
39. 39.107 × 92 =
40. 40.94 × 87 =

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