Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 658 · 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. 1.99 × 99 =
2. 2.11 × 12 =
3. 3.967 × 978 =
4. 4.98 × 98 =
5. 5.1026 × 1040 =
6. 6.102 × 101 =
7. 7.107 × 95 =
8. 8.6 × 6 =
9. 9.97 × 92 =
10. 10.115 × 113 =
11. 11.91 × 91 =
12. 12.7 × 9 =
13. 13.99 × 97 =
14. 14.107 × 106 =
15. 15.86 × 91 =
16. 16.1032 × 1024 =
17. 17.97 × 85 =
18. 18.8 × 8 =
19. 19.98 × 92 =
20. 20.89 × 90 =
21. 21.110 × 105 =
22. 22.97 × 92 =
23. 23.99 × 97 =
24. 24.101 × 113 =
25. 25.95 × 97 =
26. 26.1010 × 986 =
27. 27.91 × 87 =
28. 28.101 × 97 =
29. 29.12 × 9 =
30. 30.110 × 101 =
31. 31.6 × 9 =
32. 32.103 × 110 =
33. 33.969 × 975 =
34. 34.104 × 91 =
35. 35.11 × 13 =
36. 36.13 × 8 =
37. 37.11 × 8 =
38. 38.14 × 12 =
39. 39.113 × 95 =
40. 40.987 × 979 =

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