Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 522 · 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. 1.12 × 7 =
2. 2.109 × 99 =
3. 3.99 × 91 =
4. 4.89 × 94 =
5. 5.103 × 101 =
6. 6.11 × 13 =
7. 7.1019 × 988 =
8. 8.6 × 9 =
9. 9.12 × 14 =
10. 10.1036 × 1013 =
11. 11.6 × 8 =
12. 12.85 × 88 =
13. 13.91 × 92 =
14. 14.1015 × 1009 =
15. 15.111 × 108 =
16. 16.1030 × 1013 =
17. 17.988 × 973 =
18. 18.1035 × 960 =
19. 19.114 × 89 =
20. 20.12 × 13 =
21. 21.7 × 9 =
22. 22.9 × 6 =
23. 23.1038 × 1029 =
24. 24.972 × 964 =
25. 25.88 × 86 =
26. 26.105 × 93 =
27. 27.1004 × 1025 =
28. 28.1020 × 1036 =
29. 29.93 × 98 =
30. 30.99 × 91 =
31. 31.986 × 973 =
32. 32.9 × 6 =
33. 33.976 × 998 =
34. 34.1001 × 1014 =
35. 35.12 × 8 =
36. 36.13 × 6 =
37. 37.1033 × 982 =
38. 38.13 × 13 =
39. 39.115 × 105 =
40. 40.12 × 12 =

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