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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 862 · 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. 1.71 × 8 =
  2. 2.12 × 8 =
  3. 3.18 × 4 =
  4. 4.48 × 8 =
  5. 5.66 × 8 =
  6. 6.56 × 8 =
  7. 7.34 × 4 =
  8. 8.17 × 8 =
  9. 9.19 × 8 =
  10. 10.19 × 8 =
  11. 11.81 × 4 =
  12. 12.129 × 4 =
  13. 13.158 × 4 =
  14. 14.113 × 4 =
  15. 15.43 × 8 =
  16. 16.27 × 4 =
  17. 17.136 × 4 =
  18. 18.86 × 4 =
  19. 19.75 × 8 =
  20. 20.55 × 8 =
  21. 21.110 × 4 =
  22. 22.72 × 4 =
  23. 23.76 × 4 =
  24. 24.106 × 4 =
  25. 25.61 × 8 =
  26. 26.129 × 4 =
  27. 27.126 × 4 =
  28. 28.107 × 4 =
  29. 29.72 × 8 =
  30. 30.12 × 8 =
  31. 31.89 × 4 =
  32. 32.14 × 8 =
  33. 33.25 × 8 =
  34. 34.118 × 4 =
  35. 35.43 × 8 =
  36. 36.54 × 8 =
  37. 37.32 × 4 =
  38. 38.64 × 8 =
  39. 39.74 × 8 =
  40. 40.67 × 8 =

Answer key

  1. 568
  2. 96
  3. 72
  4. 384
  5. 528
  6. 448
  7. 136
  8. 136
  9. 152
  10. 152
  11. 324
  12. 516
  13. 632
  14. 452
  15. 344
  16. 108
  17. 544
  18. 344
  19. 600
  20. 440
  21. 440
  22. 288
  23. 304
  24. 424
  25. 488
  26. 516
  27. 504
  28. 428
  29. 576
  30. 96
  31. 356
  32. 112
  33. 200
  34. 472
  35. 344
  36. 432
  37. 128
  38. 512
  39. 592
  40. 536

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