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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 493 · 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. 1.208 × 205 =
  2. 2.28 × 26 =
  3. 3.508 × 505 =
  4. 4.34 × 32 =
  5. 5.394 × 392 =
  6. 6.72 × 73 =
  7. 7.83 × 82 =
  8. 8.17 × 19 =
  9. 9.203 × 204 =
  10. 10.494 × 493 =
  11. 11.598 × 592 =
  12. 12.205 × 208 =
  13. 13.596 × 596 =
  14. 14.293 × 296 =
  15. 15.599 × 595 =
  16. 16.48 × 47 =
  17. 17.402 × 408 =
  18. 18.402 × 404 =
  19. 19.401 × 404 =
  20. 20.603 × 607 =
  21. 21.63 × 62 =
  22. 22.495 × 495 =
  23. 23.21 × 22 =
  24. 24.47 × 47 =
  25. 25.27 × 27 =
  26. 26.198 × 193 =
  27. 27.198 × 195 =
  28. 28.23 × 22 =
  29. 29.16 × 19 =
  30. 30.194 × 198 =
  31. 31.498 × 499 =
  32. 32.294 × 299 =
  33. 33.391 × 395 =
  34. 34.92 × 94 =
  35. 35.89 × 89 =
  36. 36.193 × 191 =
  37. 37.88 × 87 =
  38. 38.308 × 307 =
  39. 39.32 × 33 =
  40. 40.53 × 53 =

Answer key

  1. 42640
  2. 728
  3. 256540
  4. 1088
  5. 154448
  6. 5256
  7. 6806
  8. 323
  9. 41412
  10. 243542
  11. 354016
  12. 42640
  13. 355216
  14. 86728
  15. 356405
  16. 2256
  17. 164016
  18. 162408
  19. 162004
  20. 366021
  21. 3906
  22. 245025
  23. 462
  24. 2209
  25. 729
  26. 38214
  27. 38610
  28. 506
  29. 304
  30. 38412
  31. 248502
  32. 87906
  33. 154445
  34. 8648
  35. 7921
  36. 36863
  37. 7656
  38. 94556
  39. 1056
  40. 2809

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