Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 692 · 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. 1.72 × 74 =
2. 2.52 × 52 =
3. 3.89 × 86 =
4. 4.59 × 58 =
5. 5.399 × 393 =
6. 6.49 × 46 =
7. 7.592 × 591 =
8. 8.408 × 403 =
9. 9.594 × 593 =
10. 10.43 × 42 =
11. 11.49 × 49 =
12. 12.77 × 78 =
13. 13.81 × 82 =
14. 14.64 × 62 =
15. 15.493 × 498 =
16. 16.398 × 396 =
17. 17.57 × 59 =
18. 18.194 × 199 =
19. 19.301 × 307 =
20. 20.21 × 21 =
21. 21.21 × 22 =
22. 22.34 × 31 =
23. 23.309 × 309 =
24. 24.32 × 32 =
25. 25.86 × 87 =
26. 26.294 × 294 =
27. 27.299 × 291 =
28. 28.56 × 58 =
29. 29.495 × 495 =
30. 30.491 × 499 =
31. 31.209 × 207 =
32. 32.92 × 93 =
33. 33.89 × 86 =
34. 34.508 × 503 =
35. 35.17 × 19 =
36. 36.29 × 29 =
37. 37.508 × 508 =
38. 38.203 × 207 =
39. 39.89 × 86 =
40. 40.64 × 62 =

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