Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 631 · 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. 1.99 × 87 =
2. 2.6 × 8 =
3. 3.105 × 103 =
4. 4.13 × 14 =
5. 5.86 × 85 =
6. 6.88 × 90 =
7. 7.112 × 89 =
8. 8.105 × 87 =
9. 9.95 × 91 =
10. 10.102 × 88 =
11. 11.1040 × 1002 =
12. 12.112 × 96 =
13. 13.7 × 7 =
14. 14.6 × 8 =
15. 15.96 × 92 =
16. 16.96 × 98 =
17. 17.13 × 12 =
18. 18.105 × 94 =
19. 19.106 × 107 =
20. 20.1006 × 1009 =
21. 21.11 × 9 =
22. 22.87 × 88 =
23. 23.92 × 96 =
24. 24.87 × 96 =
25. 25.14 × 6 =
26. 26.8 × 7 =
27. 27.90 × 88 =
28. 28.103 × 87 =
29. 29.11 × 12 =
30. 30.91 × 99 =
31. 31.11 × 7 =
32. 32.93 × 96 =
33. 33.14 × 11 =
34. 34.101 × 109 =
35. 35.1034 × 1021 =
36. 36.12 × 13 =
37. 37.9 × 9 =
38. 38.13 × 11 =
39. 39.13 × 6 =
40. 40.95 × 98 =

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