Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 283 · 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. 1.1017 × 1010 =
2. 2.8 × 9 =
3. 3.112 × 98 =
4. 4.109 × 97 =
5. 5.102 × 110 =
6. 6.8 × 9 =
7. 7.14 × 13 =
8. 8.1007 × 1007 =
9. 9.92 × 98 =
10. 10.88 × 86 =
11. 11.1024 × 972 =
12. 12.11 × 12 =
13. 13.111 × 97 =
14. 14.93 × 93 =
15. 15.99 × 87 =
16. 16.6 × 9 =
17. 17.85 × 90 =
18. 18.8 × 8 =
19. 19.115 × 87 =
20. 20.107 × 98 =
21. 21.13 × 8 =
22. 22.1007 × 1030 =
23. 23.1025 × 992 =
24. 24.11 × 14 =
25. 25.102 × 85 =
26. 26.980 × 991 =
27. 27.104 × 114 =
28. 28.12 × 11 =
29. 29.102 × 94 =
30. 30.109 × 95 =
31. 31.103 × 111 =
32. 32.94 × 89 =
33. 33.107 × 112 =
34. 34.105 × 103 =
35. 35.88 × 98 =
36. 36.13 × 9 =
37. 37.103 × 103 =
38. 38.107 × 98 =
39. 39.987 × 970 =
40. 40.111 × 106 =

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