Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 680 · 40 sums

The trick (Anurupyena): Pick the working base (like 40 = 4 × 10 or 300 = 3 × 100) and write each number’s difference from it. Cross-add as in trick 3, then multiply that left part by 4 (or 3, 5…). Right part: multiply the differences — 1 digit for a × 10 base, 2 digits for a × 100 base (carry the extra).

1. 1.205 × 207 =
2. 2.506 × 501 =
3. 3.603 × 603 =
4. 4.19 × 17 =
5. 5.87 × 87 =
6. 6.84 × 83 =
7. 7.19 × 18 =
8. 8.506 × 509 =
9. 9.24 × 21 =
10. 10.191 × 198 =
11. 11.207 × 206 =
12. 12.394 × 391 =
13. 13.68 × 66 =
14. 14.32 × 32 =
15. 15.197 × 194 =
16. 16.79 × 77 =
17. 17.197 × 198 =
18. 18.23 × 23 =
19. 19.205 × 205 =
20. 20.496 × 499 =
21. 21.207 × 201 =
22. 22.88 × 89 =
23. 23.31 × 32 =
24. 24.21 × 21 =
25. 25.58 × 58 =
26. 26.76 × 78 =
27. 27.16 × 17 =
28. 28.598 × 599 =
29. 29.205 × 206 =
30. 30.505 × 504 =
31. 31.591 × 594 =
32. 32.92 × 92 =
33. 33.66 × 69 =
34. 34.29 × 27 =
35. 35.94 × 93 =
36. 36.504 × 509 =
37. 37.44 × 43 =
38. 38.19 × 18 =
39. 39.17 × 18 =
40. 40.49 × 48 =

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