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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 447 · 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. 1.19 × 8 =
  2. 2.63 × 8 =
  3. 3.116 × 4 =
  4. 4.74 × 8 =
  5. 5.157 × 4 =
  6. 6.83 × 4 =
  7. 7.63 × 8 =
  8. 8.132 × 4 =
  9. 9.100 × 4 =
  10. 10.26 × 8 =
  11. 11.52 × 4 =
  12. 12.28 × 8 =
  13. 13.28 × 4 =
  14. 14.54 × 8 =
  15. 15.157 × 4 =
  16. 16.24 × 8 =
  17. 17.53 × 8 =
  18. 18.127 × 4 =
  19. 19.147 × 4 =
  20. 20.22 × 8 =
  21. 21.81 × 4 =
  22. 22.89 × 4 =
  23. 23.16 × 8 =
  24. 24.17 × 8 =
  25. 25.45 × 4 =
  26. 26.54 × 8 =
  27. 27.152 × 4 =
  28. 28.14 × 4 =
  29. 29.122 × 4 =
  30. 30.49 × 8 =
  31. 31.55 × 8 =
  32. 32.135 × 4 =
  33. 33.37 × 4 =
  34. 34.53 × 4 =
  35. 35.36 × 4 =
  36. 36.152 × 4 =
  37. 37.64 × 8 =
  38. 38.105 × 4 =
  39. 39.34 × 8 =
  40. 40.60 × 8 =

Answer key

  1. 152
  2. 504
  3. 464
  4. 592
  5. 628
  6. 332
  7. 504
  8. 528
  9. 400
  10. 208
  11. 208
  12. 224
  13. 112
  14. 432
  15. 628
  16. 192
  17. 424
  18. 508
  19. 588
  20. 176
  21. 324
  22. 356
  23. 128
  24. 136
  25. 180
  26. 432
  27. 608
  28. 56
  29. 488
  30. 392
  31. 440
  32. 540
  33. 148
  34. 212
  35. 144
  36. 608
  37. 512
  38. 420
  39. 272
  40. 480

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