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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 348 · 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. 1.599 × 592 =
  2. 2.43 × 41 =
  3. 3.34 × 31 =
  4. 4.39 × 36 =
  5. 5.28 × 26 =
  6. 6.29 × 28 =
  7. 7.49 × 49 =
  8. 8.62 × 61 =
  9. 9.83 × 81 =
  10. 10.596 × 591 =
  11. 11.72 × 72 =
  12. 12.17 × 17 =
  13. 13.78 × 79 =
  14. 14.202 × 205 =
  15. 15.305 × 304 =
  16. 16.76 × 77 =
  17. 17.498 × 497 =
  18. 18.86 × 87 =
  19. 19.597 × 593 =
  20. 20.54 × 51 =
  21. 21.37 × 38 =
  22. 22.58 × 59 =
  23. 23.59 × 57 =
  24. 24.89 × 86 =
  25. 25.495 × 494 =
  26. 26.599 × 594 =
  27. 27.27 × 29 =
  28. 28.406 × 407 =
  29. 29.67 × 69 =
  30. 30.38 × 36 =
  31. 31.209 × 205 =
  32. 32.196 × 197 =
  33. 33.207 × 208 =
  34. 34.72 × 73 =
  35. 35.17 × 18 =
  36. 36.83 × 81 =
  37. 37.47 × 49 =
  38. 38.203 × 201 =
  39. 39.34 × 32 =
  40. 40.499 × 495 =

Answer key

  1. 354608
  2. 1763
  3. 1054
  4. 1404
  5. 728
  6. 812
  7. 2401
  8. 3782
  9. 6723
  10. 352236
  11. 5184
  12. 289
  13. 6162
  14. 41410
  15. 92720
  16. 5852
  17. 247506
  18. 7482
  19. 354021
  20. 2754
  21. 1406
  22. 3422
  23. 3363
  24. 7654
  25. 244530
  26. 355806
  27. 783
  28. 165242
  29. 4623
  30. 1368
  31. 42845
  32. 38612
  33. 43056
  34. 5256
  35. 306
  36. 6723
  37. 2303
  38. 40803
  39. 1088
  40. 247005

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