Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 789 · 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. 1.109 × 99 =
2. 2.109 × 96 =
3. 3.101 × 103 =
4. 4.115 × 109 =
5. 5.88 × 95 =
6. 6.112 × 111 =
7. 7.1009 × 980 =
8. 8.88 × 87 =
9. 9.1014 × 1015 =
10. 10.114 × 99 =
11. 11.112 × 99 =
12. 12.94 × 98 =
13. 13.91 × 90 =
14. 14.97 × 90 =
15. 15.88 × 86 =
16. 16.107 × 97 =
17. 17.8 × 9 =
18. 18.114 × 109 =
19. 19.987 × 977 =
20. 20.1030 × 974 =
21. 21.113 × 99 =
22. 22.974 × 988 =
23. 23.987 × 988 =
24. 24.91 × 88 =
25. 25.1034 × 1026 =
26. 26.96 × 99 =
27. 27.12 × 12 =
28. 28.9 × 7 =
29. 29.9 × 9 =
30. 30.9 × 9 =
31. 31.115 × 89 =
32. 32.8 × 7 =
33. 33.6 × 8 =
34. 34.88 × 93 =
35. 35.996 × 999 =
36. 36.8 × 9 =
37. 37.90 × 88 =
38. 38.86 × 92 =
39. 39.967 × 981 =
40. 40.98 × 85 =

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