Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 554 · 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 × 97 =
2. 2.103 × 91 =
3. 3.95 × 89 =
4. 4.6 × 6 =
5. 5.11 × 12 =
6. 6.107 × 87 =
7. 7.113 × 90 =
8. 8.105 × 106 =
9. 9.11 × 14 =
10. 10.102 × 105 =
11. 11.103 × 106 =
12. 12.1007 × 991 =
13. 13.1034 × 1002 =
14. 14.7 × 6 =
15. 15.11 × 14 =
16. 16.90 × 94 =
17. 17.101 × 98 =
18. 18.99 × 89 =
19. 19.14 × 13 =
20. 20.103 × 105 =
21. 21.93 × 89 =
22. 22.97 × 90 =
23. 23.91 × 90 =
24. 24.88 × 98 =
25. 25.111 × 98 =
26. 26.8 × 9 =
27. 27.6 × 9 =
28. 28.101 × 112 =
29. 29.88 × 95 =
30. 30.1040 × 1033 =
31. 31.13 × 9 =
32. 32.110 × 111 =
33. 33.89 × 87 =
34. 34.89 × 98 =
35. 35.89 × 95 =
36. 36.9 × 8 =
37. 37.113 × 101 =
38. 38.110 × 104 =
39. 39.12 × 8 =
40. 40.99 × 87 =

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