Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 404 · 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. 1.8 × 9 =
2. 2.112 × 108 =
3. 3.97 × 99 =
4. 4.1030 × 1005 =
5. 5.6 × 9 =
6. 6.8 × 8 =
7. 7.111 × 90 =
8. 8.1034 × 999 =
9. 9.1005 × 997 =
10. 10.99 × 97 =
11. 11.7 × 6 =
12. 12.1006 × 1011 =
13. 13.975 × 960 =
14. 14.115 × 98 =
15. 15.109 × 88 =
16. 16.1020 × 999 =
17. 17.103 × 110 =
18. 18.86 × 95 =
19. 19.89 × 91 =
20. 20.1005 × 1031 =
21. 21.12 × 9 =
22. 22.109 × 109 =
23. 23.8 × 7 =
24. 24.104 × 106 =
25. 25.961 × 987 =
26. 26.86 × 89 =
27. 27.994 × 990 =
28. 28.102 × 102 =
29. 29.114 × 94 =
30. 30.101 × 115 =
31. 31.115 × 87 =
32. 32.14 × 14 =
33. 33.14 × 7 =
34. 34.109 × 109 =
35. 35.6 × 8 =
36. 36.966 × 968 =
37. 37.103 × 93 =
38. 38.108 × 114 =
39. 39.87 × 93 =
40. 40.94 × 98 =

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