Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 198 · 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. 1.115 × 89 =
2. 2.971 × 993 =
3. 3.93 × 91 =
4. 4.112 × 91 =
5. 5.11 × 9 =
6. 6.101 × 104 =
7. 7.11 × 6 =
8. 8.98 × 97 =
9. 9.92 × 95 =
10. 10.6 × 7 =
11. 11.89 × 92 =
12. 12.115 × 87 =
13. 13.107 × 104 =
14. 14.6 × 7 =
15. 15.105 × 114 =
16. 16.983 × 972 =
17. 17.9 × 7 =
18. 18.99 × 93 =
19. 19.1024 × 1010 =
20. 20.11 × 8 =
21. 21.89 × 87 =
22. 22.1017 × 967 =
23. 23.105 × 87 =
24. 24.94 × 91 =
25. 25.12 × 13 =
26. 26.114 × 108 =
27. 27.114 × 109 =
28. 28.102 × 99 =
29. 29.93 × 87 =
30. 30.113 × 96 =
31. 31.980 × 968 =
32. 32.99 × 98 =
33. 33.12 × 6 =
34. 34.85 × 98 =
35. 35.111 × 106 =
36. 36.1006 × 966 =
37. 37.11 × 9 =
38. 38.105 × 109 =
39. 39.85 × 88 =
40. 40.99 × 99 =

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