Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 61 · 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. 1.1020 × 1030 =
2. 2.108 × 111 =
3. 3.6 × 7 =
4. 4.1030 × 1028 =
5. 5.11 × 13 =
6. 6.9 × 8 =
7. 7.14 × 9 =
8. 8.12 × 9 =
9. 9.87 × 95 =
10. 10.107 × 103 =
11. 11.113 × 85 =
12. 12.8 × 6 =
13. 13.962 × 972 =
14. 14.6 × 9 =
15. 15.99 × 88 =
16. 16.11 × 6 =
17. 17.97 × 89 =
18. 18.12 × 13 =
19. 19.989 × 964 =
20. 20.97 × 87 =
21. 21.7 × 9 =
22. 22.12 × 11 =
23. 23.86 × 92 =
24. 24.1016 × 1014 =
25. 25.12 × 9 =
26. 26.12 × 7 =
27. 27.7 × 8 =
28. 28.9 × 6 =
29. 29.115 × 90 =
30. 30.9 × 6 =
31. 31.95 × 85 =
32. 32.94 × 91 =
33. 33.6 × 8 =
34. 34.87 × 96 =
35. 35.102 × 106 =
36. 36.99 × 97 =
37. 37.94 × 97 =
38. 38.7 × 6 =
39. 39.115 × 104 =
40. 40.6 × 8 =

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