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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 390 · 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. 1.591 × 594 =
  2. 2.509 × 503 =
  3. 3.51 × 51 =
  4. 4.73 × 72 =
  5. 5.33 × 33 =
  6. 6.26 × 29 =
  7. 7.599 × 596 =
  8. 8.403 × 401 =
  9. 9.297 × 291 =
  10. 10.203 × 207 =
  11. 11.31 × 32 =
  12. 12.66 × 68 =
  13. 13.24 × 24 =
  14. 14.22 × 23 =
  15. 15.503 × 502 =
  16. 16.209 × 202 =
  17. 17.208 × 203 =
  18. 18.406 × 402 =
  19. 19.38 × 37 =
  20. 20.18 × 19 =
  21. 21.301 × 302 =
  22. 22.32 × 34 =
  23. 23.502 × 504 =
  24. 24.73 × 74 =
  25. 25.22 × 22 =
  26. 26.69 × 66 =
  27. 27.294 × 294 =
  28. 28.395 × 397 =
  29. 29.299 × 292 =
  30. 30.194 × 198 =
  31. 31.22 × 21 =
  32. 32.48 × 49 =
  33. 33.51 × 52 =
  34. 34.16 × 16 =
  35. 35.507 × 507 =
  36. 36.73 × 72 =
  37. 37.22 × 24 =
  38. 38.41 × 42 =
  39. 39.28 × 26 =
  40. 40.74 × 72 =

Answer key

  1. 351054
  2. 256027
  3. 2601
  4. 5256
  5. 1089
  6. 754
  7. 357004
  8. 161603
  9. 86427
  10. 42021
  11. 992
  12. 4488
  13. 576
  14. 506
  15. 252506
  16. 42218
  17. 42224
  18. 163212
  19. 1406
  20. 342
  21. 90902
  22. 1088
  23. 253008
  24. 5402
  25. 484
  26. 4554
  27. 86436
  28. 156815
  29. 87308
  30. 38412
  31. 462
  32. 2352
  33. 2652
  34. 256
  35. 257049
  36. 5256
  37. 528
  38. 1722
  39. 728
  40. 5328

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