Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 315 · 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. 1.94 × 89 =
2. 2.113 × 103 =
3. 3.94 × 91 =
4. 4.6 × 9 =
5. 5.107 × 90 =
6. 6.1032 × 1039 =
7. 7.1009 × 988 =
8. 8.105 × 97 =
9. 9.14 × 11 =
10. 10.7 × 9 =
11. 11.1023 × 1021 =
12. 12.113 × 104 =
13. 13.98 × 91 =
14. 14.113 × 93 =
15. 15.105 × 93 =
16. 16.98 × 96 =
17. 17.12 × 12 =
18. 18.1023 × 1040 =
19. 19.99 × 90 =
20. 20.109 × 108 =
21. 21.111 × 102 =
22. 22.9 × 7 =
23. 23.8 × 8 =
24. 24.113 × 107 =
25. 25.112 × 102 =
26. 26.105 × 108 =
27. 27.111 × 85 =
28. 28.90 × 90 =
29. 29.111 × 110 =
30. 30.108 × 112 =
31. 31.11 × 12 =
32. 32.105 × 109 =
33. 33.6 × 7 =
34. 34.8 × 7 =
35. 35.1040 × 988 =
36. 36.112 × 99 =
37. 37.103 × 108 =
38. 38.94 × 99 =
39. 39.91 × 85 =
40. 40.983 × 997 =

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