Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 792 · 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. 1.98 × 91 =
2. 2.93 × 91 =
3. 3.107 × 111 =
4. 4.109 × 115 =
5. 5.94 × 90 =
6. 6.99 × 91 =
7. 7.90 × 85 =
8. 8.113 × 102 =
9. 9.1034 × 1002 =
10. 10.985 × 967 =
11. 11.8 × 8 =
12. 12.107 × 93 =
13. 13.102 × 93 =
14. 14.988 × 998 =
15. 15.115 × 88 =
16. 16.107 × 95 =
17. 17.1003 × 998 =
18. 18.112 × 101 =
19. 19.97 × 91 =
20. 20.110 × 102 =
21. 21.1001 × 1014 =
22. 22.90 × 89 =
23. 23.988 × 992 =
24. 24.8 × 6 =
25. 25.12 × 12 =
26. 26.86 × 93 =
27. 27.8 × 9 =
28. 28.110 × 111 =
29. 29.109 × 113 =
30. 30.108 × 110 =
31. 31.1011 × 995 =
32. 32.1012 × 998 =
33. 33.991 × 996 =
34. 34.96 × 87 =
35. 35.105 × 96 =
36. 36.101 × 110 =
37. 37.103 × 96 =
38. 38.104 × 113 =
39. 39.11 × 7 =
40. 40.87 × 91 =

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