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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 386 · 40 sums
TalentJR

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).

NameDateTime takenScore ___ / 40
  1. 1.38 × 37 =
  2. 2.44 × 41 =
  3. 3.18 × 16 =
  4. 4.68 × 69 =
  5. 5.64 × 61 =
  6. 6.28 × 26 =
  7. 7.494 × 493 =
  8. 8.197 × 199 =
  9. 9.38 × 37 =
  10. 10.59 × 58 =
  11. 11.194 × 196 =
  12. 12.67 × 69 =
  13. 13.81 × 81 =
  14. 14.54 × 54 =
  15. 15.491 × 496 =
  16. 16.24 × 22 =
  17. 17.38 × 39 =
  18. 18.601 × 605 =
  19. 19.39 × 38 =
  20. 20.33 × 34 =
  21. 21.492 × 499 =
  22. 22.193 × 195 =
  23. 23.292 × 298 =
  24. 24.89 × 86 =
  25. 25.64 × 61 =
  26. 26.66 × 69 =
  27. 27.292 × 295 =
  28. 28.394 × 391 =
  29. 29.48 × 48 =
  30. 30.398 × 394 =
  31. 31.69 × 67 =
  32. 32.22 × 23 =
  33. 33.206 × 204 =
  34. 34.26 × 27 =
  35. 35.307 × 302 =
  36. 36.607 × 605 =
  37. 37.33 × 33 =
  38. 38.493 × 495 =
  39. 39.298 × 299 =
  40. 40.47 × 49 =

Answer key

  1. 1406
  2. 1804
  3. 288
  4. 4692
  5. 3904
  6. 728
  7. 243542
  8. 39203
  9. 1406
  10. 3422
  11. 38024
  12. 4623
  13. 6561
  14. 2916
  15. 243536
  16. 528
  17. 1482
  18. 363605
  19. 1482
  20. 1122
  21. 245508
  22. 37635
  23. 87016
  24. 7654
  25. 3904
  26. 4554
  27. 86140
  28. 154054
  29. 2304
  30. 156812
  31. 4623
  32. 506
  33. 42024
  34. 702
  35. 92714
  36. 367235
  37. 1089
  38. 244035
  39. 89102
  40. 2303

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