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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 218 · 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. 1.395 × 394 =
  2. 2.67 × 67 =
  3. 3.197 × 194 =
  4. 4.208 × 204 =
  5. 5.206 × 201 =
  6. 6.31 × 31 =
  7. 7.27 × 26 =
  8. 8.502 × 509 =
  9. 9.396 × 392 =
  10. 10.18 × 17 =
  11. 11.495 × 498 =
  12. 12.74 × 71 =
  13. 13.69 × 69 =
  14. 14.64 × 63 =
  15. 15.81 × 84 =
  16. 16.63 × 61 =
  17. 17.192 × 197 =
  18. 18.91 × 92 =
  19. 19.198 × 191 =
  20. 20.92 × 93 =
  21. 21.202 × 207 =
  22. 22.292 × 295 =
  23. 23.56 × 59 =
  24. 24.297 × 297 =
  25. 25.601 × 601 =
  26. 26.86 × 87 =
  27. 27.77 × 78 =
  28. 28.606 × 603 =
  29. 29.39 × 38 =
  30. 30.305 × 305 =
  31. 31.28 × 29 =
  32. 32.94 × 93 =
  33. 33.92 × 94 =
  34. 34.71 × 74 =
  35. 35.599 × 597 =
  36. 36.303 × 309 =
  37. 37.391 × 399 =
  38. 38.49 × 46 =
  39. 39.67 × 68 =
  40. 40.495 × 495 =

Answer key

  1. 155630
  2. 4489
  3. 38218
  4. 42432
  5. 41406
  6. 961
  7. 702
  8. 255518
  9. 155232
  10. 306
  11. 246510
  12. 5254
  13. 4761
  14. 4032
  15. 6804
  16. 3843
  17. 37824
  18. 8372
  19. 37818
  20. 8556
  21. 41814
  22. 86140
  23. 3304
  24. 88209
  25. 361201
  26. 7482
  27. 6006
  28. 365418
  29. 1482
  30. 93025
  31. 812
  32. 8742
  33. 8648
  34. 5254
  35. 357603
  36. 93627
  37. 156009
  38. 2254
  39. 4556
  40. 245025

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