Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 753 · 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. 1.1033 × 1015 =
2. 2.107 × 101 =
3. 3.101 × 102 =
4. 4.12 × 8 =
5. 5.103 × 111 =
6. 6.112 × 103 =
7. 7.960 × 961 =
8. 8.114 × 95 =
9. 9.105 × 112 =
10. 10.1002 × 1016 =
11. 11.102 × 112 =
12. 12.9 × 6 =
13. 13.7 × 9 =
14. 14.14 × 7 =
15. 15.985 × 961 =
16. 16.12 × 13 =
17. 17.12 × 11 =
18. 18.85 × 96 =
19. 19.115 × 87 =
20. 20.108 × 112 =
21. 21.9 × 7 =
22. 22.12 × 11 =
23. 23.115 × 104 =
24. 24.979 × 992 =
25. 25.994 × 998 =
26. 26.87 × 99 =
27. 27.113 × 91 =
28. 28.11 × 8 =
29. 29.112 × 96 =
30. 30.102 × 112 =
31. 31.996 × 987 =
32. 32.104 × 97 =
33. 33.11 × 6 =
34. 34.87 × 99 =
35. 35.97 × 87 =
36. 36.111 × 87 =
37. 37.14 × 11 =
38. 38.105 × 115 =
39. 39.13 × 12 =
40. 40.8 × 7 =

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