Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 739 · 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. 1.1028 × 1015 =
2. 2.14 × 11 =
3. 3.85 × 89 =
4. 4.94 × 92 =
5. 5.12 × 12 =
6. 6.8 × 9 =
7. 7.101 × 99 =
8. 8.1031 × 1022 =
9. 9.93 × 98 =
10. 10.98 × 89 =
11. 11.98 × 91 =
12. 12.85 × 98 =
13. 13.101 × 103 =
14. 14.13 × 11 =
15. 15.995 × 999 =
16. 16.93 × 95 =
17. 17.103 × 104 =
18. 18.983 × 964 =
19. 19.91 × 87 =
20. 20.86 × 86 =
21. 21.12 × 12 =
22. 22.86 × 94 =
23. 23.101 × 110 =
24. 24.1023 × 973 =
25. 25.9 × 9 =
26. 26.99 × 86 =
27. 27.97 × 85 =
28. 28.102 × 88 =
29. 29.89 × 94 =
30. 30.11 × 12 =
31. 31.104 × 90 =
32. 32.109 × 105 =
33. 33.102 × 103 =
34. 34.992 × 998 =
35. 35.1032 × 982 =
36. 36.8 × 8 =
37. 37.1022 × 1002 =
38. 38.111 × 98 =
39. 39.115 × 106 =
40. 40.109 × 105 =

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