Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 504 · 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. 1.990 × 991 =
2. 2.1022 × 962 =
3. 3.90 × 92 =
4. 4.97 × 87 =
5. 5.88 × 94 =
6. 6.1002 × 1032 =
7. 7.12 × 14 =
8. 8.1023 × 1023 =
9. 9.98 × 99 =
10. 10.6 × 7 =
11. 11.98 × 99 =
12. 12.88 × 88 =
13. 13.109 × 104 =
14. 14.1007 × 967 =
15. 15.989 × 973 =
16. 16.109 × 86 =
17. 17.13 × 13 =
18. 18.8 × 6 =
19. 19.99 × 87 =
20. 20.6 × 7 =
21. 21.97 × 86 =
22. 22.106 × 102 =
23. 23.109 × 108 =
24. 24.91 × 97 =
25. 25.101 × 104 =
26. 26.88 × 89 =
27. 27.9 × 9 =
28. 28.965 × 961 =
29. 29.106 × 101 =
30. 30.975 × 999 =
31. 31.14 × 9 =
32. 32.102 × 95 =
33. 33.966 × 966 =
34. 34.102 × 98 =
35. 35.97 × 94 =
36. 36.985 × 968 =
37. 37.982 × 982 =
38. 38.1036 × 980 =
39. 39.112 × 103 =
40. 40.1004 × 970 =

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