Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 202 · 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. 1.98 × 99 =
2. 2.965 × 997 =
3. 3.978 × 964 =
4. 4.93 × 97 =
5. 5.96 × 93 =
6. 6.97 × 98 =
7. 7.106 × 108 =
8. 8.13 × 7 =
9. 9.8 × 9 =
10. 10.967 × 978 =
11. 11.103 × 113 =
12. 12.86 × 89 =
13. 13.88 × 98 =
14. 14.1005 × 1023 =
15. 15.93 × 89 =
16. 16.1015 × 1024 =
17. 17.14 × 12 =
18. 18.8 × 6 =
19. 19.1017 × 990 =
20. 20.101 × 111 =
21. 21.11 × 6 =
22. 22.90 × 89 =
23. 23.86 × 94 =
24. 24.105 × 85 =
25. 25.97 × 86 =
26. 26.972 × 990 =
27. 27.103 × 114 =
28. 28.89 × 96 =
29. 29.103 × 102 =
30. 30.8 × 7 =
31. 31.99 × 87 =
32. 32.108 × 95 =
33. 33.91 × 91 =
34. 34.9 × 9 =
35. 35.112 × 98 =
36. 36.11 × 12 =
37. 37.110 × 93 =
38. 38.108 × 102 =
39. 39.11 × 13 =
40. 40.6 × 7 =

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