Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 372 · 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. 1.88 × 99 =
2. 2.6 × 9 =
3. 3.11 × 12 =
4. 4.102 × 109 =
5. 5.7 × 7 =
6. 6.988 × 982 =
7. 7.7 × 6 =
8. 8.101 × 98 =
9. 9.96 × 95 =
10. 10.1009 × 985 =
11. 11.91 × 98 =
12. 12.93 × 92 =
13. 13.1001 × 1010 =
14. 14.96 × 98 =
15. 15.102 × 103 =
16. 16.99 × 94 =
17. 17.112 × 90 =
18. 18.106 × 98 =
19. 19.103 × 96 =
20. 20.13 × 11 =
21. 21.94 × 88 =
22. 22.1018 × 1015 =
23. 23.114 × 107 =
24. 24.9 × 6 =
25. 25.1004 × 1002 =
26. 26.86 × 97 =
27. 27.11 × 6 =
28. 28.109 × 99 =
29. 29.102 × 108 =
30. 30.1034 × 964 =
31. 31.984 × 991 =
32. 32.112 × 107 =
33. 33.87 × 85 =
34. 34.1002 × 1021 =
35. 35.990 × 980 =
36. 36.1018 × 1023 =
37. 37.88 × 98 =
38. 38.1018 × 990 =
39. 39.12 × 11 =
40. 40.8 × 8 =

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