Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 751 · 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. 1.9 × 7 =
2. 2.110 × 104 =
3. 3.103 × 103 =
4. 4.113 × 89 =
5. 5.6 × 7 =
6. 6.14 × 13 =
7. 7.90 × 86 =
8. 8.1028 × 1012 =
9. 9.109 × 105 =
10. 10.12 × 7 =
11. 11.12 × 8 =
12. 12.14 × 9 =
13. 13.109 × 99 =
14. 14.6 × 8 =
15. 15.13 × 6 =
16. 16.7 × 6 =
17. 17.102 × 86 =
18. 18.111 × 94 =
19. 19.114 × 103 =
20. 20.9 × 8 =
21. 21.109 × 90 =
22. 22.96 × 95 =
23. 23.115 × 107 =
24. 24.110 × 97 =
25. 25.9 × 9 =
26. 26.102 × 87 =
27. 27.110 × 99 =
28. 28.6 × 7 =
29. 29.102 × 99 =
30. 30.1032 × 1023 =
31. 31.6 × 8 =
32. 32.92 × 90 =
33. 33.1040 × 1003 =
34. 34.1039 × 963 =
35. 35.99 × 92 =
36. 36.102 × 86 =
37. 37.90 × 93 =
38. 38.113 × 105 =
39. 39.101 × 105 =
40. 40.104 × 92 =

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