Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 216 · 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 × 6 =
2. 2.8 × 7 =
3. 3.88 × 87 =
4. 4.1005 × 1017 =
5. 5.102 × 96 =
6. 6.996 × 998 =
7. 7.7 × 9 =
8. 8.108 × 97 =
9. 9.8 × 7 =
10. 10.7 × 6 =
11. 11.1021 × 1008 =
12. 12.9 × 8 =
13. 13.13 × 7 =
14. 14.1025 × 1020 =
15. 15.87 × 87 =
16. 16.988 × 986 =
17. 17.1011 × 1016 =
18. 18.109 × 92 =
19. 19.86 × 85 =
20. 20.91 × 88 =
21. 21.92 × 91 =
22. 22.1022 × 991 =
23. 23.9 × 9 =
24. 24.107 × 86 =
25. 25.105 × 107 =
26. 26.94 × 91 =
27. 27.95 × 96 =
28. 28.105 × 95 =
29. 29.108 × 110 =
30. 30.9 × 6 =
31. 31.9 × 7 =
32. 32.110 × 86 =
33. 33.113 × 98 =
34. 34.1040 × 969 =
35. 35.105 × 112 =
36. 36.111 × 111 =
37. 37.108 × 113 =
38. 38.106 × 109 =
39. 39.1014 × 1023 =
40. 40.9 × 9 =

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