Near-Base Multiplication Worksheet

Vedic maths trick 3: Multiplying numbers near 10, 100 and 1000 · Set 875 · 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. 1.9 × 9 =
2. 2.1040 × 1015 =
3. 3.1012 × 1030 =
4. 4.87 × 91 =
5. 5.98 × 92 =
6. 6.92 × 99 =
7. 7.115 × 112 =
8. 8.13 × 9 =
9. 9.102 × 90 =
10. 10.979 × 978 =
11. 11.8 × 8 =
12. 12.8 × 6 =
13. 13.110 × 109 =
14. 14.102 × 111 =
15. 15.103 × 90 =
16. 16.13 × 11 =
17. 17.96 × 91 =
18. 18.993 × 999 =
19. 19.85 × 85 =
20. 20.86 × 98 =
21. 21.108 × 111 =
22. 22.104 × 114 =
23. 23.11 × 14 =
24. 24.12 × 7 =
25. 25.101 × 98 =
26. 26.967 × 967 =
27. 27.92 × 95 =
28. 28.109 × 90 =
29. 29.102 × 107 =
30. 30.978 × 981 =
31. 31.105 × 113 =
32. 32.105 × 102 =
33. 33.102 × 105 =
34. 34.13 × 9 =
35. 35.111 × 114 =
36. 36.109 × 95 =
37. 37.112 × 93 =
38. 38.8 × 6 =
39. 39.12 × 11 =
40. 40.112 × 112 =

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