Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 22 · 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. 1.1014 × 1015 =
2. 2.114 × 105 =
3. 3.6 × 6 =
4. 4.8 × 7 =
5. 5.1020 × 1037 =
6. 6.88 × 87 =
7. 7.11 × 12 =
8. 8.112 × 109 =
9. 9.1013 × 978 =
10. 10.8 × 7 =
11. 11.966 × 986 =
12. 12.991 × 996 =
13. 13.98 × 94 =
14. 14.95 × 96 =
15. 15.87 × 87 =
16. 16.104 × 86 =
17. 17.85 × 87 =
18. 18.95 × 99 =
19. 19.8 × 6 =
20. 20.11 × 14 =
21. 21.11 × 12 =
22. 22.109 × 99 =
23. 23.1003 × 1005 =
24. 24.987 × 993 =
25. 25.102 × 88 =
26. 26.962 × 965 =
27. 27.92 × 97 =
28. 28.105 × 111 =
29. 29.114 × 87 =
30. 30.7 × 6 =
31. 31.101 × 104 =
32. 32.106 × 101 =
33. 33.105 × 103 =
34. 34.108 × 112 =
35. 35.986 × 965 =
36. 36.105 × 105 =
37. 37.112 × 96 =
38. 38.8 × 8 =
39. 39.115 × 101 =
40. 40.113 × 114 =

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