Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 692 · 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. 1.997 × 979 =
2. 2.11 × 9 =
3. 3.6 × 9 =
4. 4.1010 × 1031 =
5. 5.111 × 93 =
6. 6.12 × 7 =
7. 7.92 × 88 =
8. 8.1022 × 972 =
9. 9.12 × 14 =
10. 10.106 × 104 =
11. 11.102 × 111 =
12. 12.996 × 966 =
13. 13.101 × 97 =
14. 14.98 × 95 =
15. 15.1012 × 1011 =
16. 16.111 × 108 =
17. 17.110 × 111 =
18. 18.13 × 12 =
19. 19.13 × 11 =
20. 20.114 × 103 =
21. 21.106 × 108 =
22. 22.115 × 113 =
23. 23.11 × 13 =
24. 24.103 × 104 =
25. 25.89 × 90 =
26. 26.6 × 9 =
27. 27.106 × 114 =
28. 28.13 × 9 =
29. 29.12 × 8 =
30. 30.111 × 107 =
31. 31.102 × 108 =
32. 32.110 × 94 =
33. 33.98 × 86 =
34. 34.111 × 109 =
35. 35.91 × 94 =
36. 36.103 × 87 =
37. 37.89 × 88 =
38. 38.97 × 98 =
39. 39.98 × 96 =
40. 40.92 × 96 =

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