Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 363 · 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. 1.1003 × 1022 =
2. 2.111 × 89 =
3. 3.967 × 998 =
4. 4.11 × 6 =
5. 5.109 × 88 =
6. 6.109 × 93 =
7. 7.1009 × 1005 =
8. 8.112 × 110 =
9. 9.91 × 85 =
10. 10.97 × 88 =
11. 11.13 × 9 =
12. 12.102 × 102 =
13. 13.93 × 99 =
14. 14.101 × 85 =
15. 15.8 × 6 =
16. 16.12 × 11 =
17. 17.104 × 105 =
18. 18.112 × 104 =
19. 19.91 × 95 =
20. 20.88 × 88 =
21. 21.85 × 95 =
22. 22.88 × 93 =
23. 23.89 × 86 =
24. 24.88 × 98 =
25. 25.105 × 89 =
26. 26.9 × 7 =
27. 27.7 × 9 =
28. 28.105 × 111 =
29. 29.1028 × 1025 =
30. 30.104 × 108 =
31. 31.14 × 12 =
32. 32.96 × 98 =
33. 33.92 × 85 =
34. 34.103 × 93 =
35. 35.9 × 8 =
36. 36.89 × 91 =
37. 37.14 × 9 =
38. 38.14 × 12 =
39. 39.108 × 98 =
40. 40.1010 × 1034 =

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