Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 81 · 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. 1.7 × 9 =
2. 2.11 × 8 =
3. 3.115 × 102 =
4. 4.114 × 115 =
5. 5.12 × 7 =
6. 6.1002 × 1017 =
7. 7.102 × 101 =
8. 8.87 × 95 =
9. 9.91 × 91 =
10. 10.97 × 91 =
11. 11.7 × 7 =
12. 12.12 × 11 =
13. 13.104 × 99 =
14. 14.1013 × 992 =
15. 15.111 × 85 =
16. 16.12 × 12 =
17. 17.14 × 11 =
18. 18.1023 × 968 =
19. 19.112 × 105 =
20. 20.11 × 6 =
21. 21.93 × 87 =
22. 22.995 × 972 =
23. 23.11 × 12 =
24. 24.85 × 88 =
25. 25.1020 × 990 =
26. 26.6 × 7 =
27. 27.12 × 8 =
28. 28.1018 × 1013 =
29. 29.6 × 8 =
30. 30.1015 × 997 =
31. 31.107 × 111 =
32. 32.91 × 95 =
33. 33.109 × 115 =
34. 34.9 × 8 =
35. 35.96 × 98 =
36. 36.98 × 87 =
37. 37.9 × 6 =
38. 38.99 × 85 =
39. 39.99 × 88 =
40. 40.108 × 102 =

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