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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 528 · 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. 1.73 × 4 =
  2. 2.15 × 8 =
  3. 3.89 × 4 =
  4. 4.55 × 4 =
  5. 5.53 × 8 =
  6. 6.72 × 8 =
  7. 7.30 × 8 =
  8. 8.74 × 8 =
  9. 9.39 × 8 =
  10. 10.101 × 4 =
  11. 11.97 × 4 =
  12. 12.92 × 4 =
  13. 13.25 × 8 =
  14. 14.66 × 4 =
  15. 15.72 × 4 =
  16. 16.115 × 4 =
  17. 17.18 × 4 =
  18. 18.130 × 4 =
  19. 19.59 × 8 =
  20. 20.117 × 4 =
  21. 21.93 × 4 =
  22. 22.59 × 8 =
  23. 23.127 × 4 =
  24. 24.126 × 4 =
  25. 25.61 × 8 =
  26. 26.48 × 4 =
  27. 27.23 × 4 =
  28. 28.51 × 4 =
  29. 29.96 × 4 =
  30. 30.33 × 4 =
  31. 31.47 × 8 =
  32. 32.72 × 4 =
  33. 33.16 × 4 =
  34. 34.40 × 8 =
  35. 35.30 × 8 =
  36. 36.26 × 8 =
  37. 37.50 × 4 =
  38. 38.61 × 8 =
  39. 39.80 × 4 =
  40. 40.137 × 4 =

Answer key

  1. 292
  2. 120
  3. 356
  4. 220
  5. 424
  6. 576
  7. 240
  8. 592
  9. 312
  10. 404
  11. 388
  12. 368
  13. 200
  14. 264
  15. 288
  16. 460
  17. 72
  18. 520
  19. 472
  20. 468
  21. 372
  22. 472
  23. 508
  24. 504
  25. 488
  26. 192
  27. 92
  28. 204
  29. 384
  30. 132
  31. 376
  32. 288
  33. 64
  34. 320
  35. 240
  36. 208
  37. 200
  38. 488
  39. 320
  40. 548

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