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Working Base Multiplication Worksheet

Vedic maths trick 15: Working-base multiplication · Set 478 · 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. 1.408 × 405 =
  2. 2.67 × 68 =
  3. 3.59 × 57 =
  4. 4.66 × 67 =
  5. 5.302 × 306 =
  6. 6.29 × 29 =
  7. 7.53 × 53 =
  8. 8.92 × 92 =
  9. 9.46 × 49 =
  10. 10.396 × 397 =
  11. 11.72 × 72 =
  12. 12.208 × 202 =
  13. 13.295 × 295 =
  14. 14.82 × 81 =
  15. 15.593 × 597 =
  16. 16.62 × 63 =
  17. 17.307 × 309 =
  18. 18.24 × 21 =
  19. 19.195 × 192 =
  20. 20.73 × 73 =
  21. 21.49 × 48 =
  22. 22.78 × 79 =
  23. 23.27 × 26 =
  24. 24.79 × 76 =
  25. 25.592 × 595 =
  26. 26.396 × 399 =
  27. 27.44 × 42 =
  28. 28.51 × 51 =
  29. 29.498 × 496 =
  30. 30.499 × 497 =
  31. 31.408 × 406 =
  32. 32.491 × 498 =
  33. 33.207 × 203 =
  34. 34.596 × 594 =
  35. 35.28 × 27 =
  36. 36.41 × 44 =
  37. 37.93 × 92 =
  38. 38.598 × 596 =
  39. 39.73 × 74 =
  40. 40.16 × 17 =

Answer key

  1. 165240
  2. 4556
  3. 3363
  4. 4422
  5. 92412
  6. 841
  7. 2809
  8. 8464
  9. 2254
  10. 157212
  11. 5184
  12. 42016
  13. 87025
  14. 6642
  15. 354021
  16. 3906
  17. 94863
  18. 504
  19. 37440
  20. 5329
  21. 2352
  22. 6162
  23. 702
  24. 6004
  25. 352240
  26. 158004
  27. 1848
  28. 2601
  29. 247008
  30. 248003
  31. 165648
  32. 244518
  33. 42021
  34. 354024
  35. 756
  36. 1804
  37. 8556
  38. 356408
  39. 5402
  40. 272

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