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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 338 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.98 × 4 =
  2. 2.58 × 8 =
  3. 3.103 × 4 =
  4. 4.33 × 8 =
  5. 5.18 × 4 =
  6. 6.74 × 4 =
  7. 7.24 × 8 =
  8. 8.141 × 4 =
  9. 9.141 × 4 =
  10. 10.121 × 4 =
  11. 11.15 × 8 =
  12. 12.110 × 4 =
  13. 13.101 × 4 =
  14. 14.81 × 4 =
  15. 15.51 × 4 =
  16. 16.47 × 8 =
  17. 17.64 × 8 =
  18. 18.68 × 8 =
  19. 19.120 × 4 =
  20. 20.145 × 4 =
  21. 21.109 × 4 =
  22. 22.66 × 8 =
  23. 23.118 × 4 =
  24. 24.34 × 8 =
  25. 25.40 × 4 =
  26. 26.50 × 8 =
  27. 27.46 × 8 =
  28. 28.16 × 8 =
  29. 29.55 × 8 =
  30. 30.15 × 8 =
  31. 31.73 × 8 =
  32. 32.61 × 8 =
  33. 33.51 × 8 =
  34. 34.25 × 8 =
  35. 35.52 × 8 =
  36. 36.39 × 4 =
  37. 37.17 × 8 =
  38. 38.105 × 4 =
  39. 39.105 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 392
  2. 464
  3. 412
  4. 264
  5. 72
  6. 296
  7. 192
  8. 564
  9. 564
  10. 484
  11. 120
  12. 440
  13. 404
  14. 324
  15. 204
  16. 376
  17. 512
  18. 544
  19. 480
  20. 580
  21. 436
  22. 528
  23. 472
  24. 272
  25. 160
  26. 400
  27. 368
  28. 128
  29. 440
  30. 120
  31. 584
  32. 488
  33. 408
  34. 200
  35. 416
  36. 156
  37. 136
  38. 420
  39. 420
  40. 68

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