Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 920 · 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. 1.1021 × 1021 =
2. 2.1017 × 1004 =
3. 3.966 × 988 =
4. 4.7 × 9 =
5. 5.975 × 977 =
6. 6.88 × 90 =
7. 7.1020 × 974 =
8. 8.6 × 9 =
9. 9.109 × 101 =
10. 10.967 × 977 =
11. 11.107 × 86 =
12. 12.114 × 109 =
13. 13.13 × 14 =
14. 14.960 × 979 =
15. 15.14 × 7 =
16. 16.115 × 96 =
17. 17.93 × 93 =
18. 18.974 × 997 =
19. 19.98 × 99 =
20. 20.110 × 85 =
21. 21.14 × 8 =
22. 22.12 × 11 =
23. 23.94 × 99 =
24. 24.12 × 11 =
25. 25.1036 × 993 =
26. 26.96 × 95 =
27. 27.11 × 12 =
28. 28.108 × 106 =
29. 29.7 × 8 =
30. 30.112 × 112 =
31. 31.103 × 94 =
32. 32.102 × 87 =
33. 33.8 × 8 =
34. 34.101 × 99 =
35. 35.105 × 110 =
36. 36.99 × 99 =
37. 37.106 × 96 =
38. 38.92 × 97 =
39. 39.6 × 8 =
40. 40.87 × 99 =

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