Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 818 · 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. 1.1031 × 1023 =
2. 2.13 × 13 =
3. 3.7 × 6 =
4. 4.106 × 107 =
5. 5.113 × 86 =
6. 6.11 × 14 =
7. 7.104 × 102 =
8. 8.92 × 91 =
9. 9.104 × 101 =
10. 10.7 × 6 =
11. 11.111 × 93 =
12. 12.95 × 88 =
13. 13.96 × 87 =
14. 14.109 × 109 =
15. 15.11 × 11 =
16. 16.105 × 103 =
17. 17.90 × 91 =
18. 18.14 × 8 =
19. 19.96 × 85 =
20. 20.11 × 14 =
21. 21.113 × 88 =
22. 22.976 × 984 =
23. 23.1026 × 983 =
24. 24.86 × 86 =
25. 25.96 × 99 =
26. 26.107 × 93 =
27. 27.6 × 6 =
28. 28.993 × 961 =
29. 29.98 × 88 =
30. 30.115 × 90 =
31. 31.110 × 90 =
32. 32.8 × 8 =
33. 33.1034 × 1020 =
34. 34.86 × 97 =
35. 35.104 × 105 =
36. 36.13 × 11 =
37. 37.13 × 14 =
38. 38.1037 × 1006 =
39. 39.105 × 112 =
40. 40.11 × 13 =

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