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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 853 · 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. 1.66 × 8 =
  2. 2.32 × 4 =
  3. 3.60 × 8 =
  4. 4.51 × 8 =
  5. 5.109 × 4 =
  6. 6.16 × 8 =
  7. 7.16 × 4 =
  8. 8.75 × 4 =
  9. 9.64 × 8 =
  10. 10.71 × 4 =
  11. 11.29 × 8 =
  12. 12.106 × 4 =
  13. 13.42 × 4 =
  14. 14.15 × 8 =
  15. 15.39 × 8 =
  16. 16.128 × 4 =
  17. 17.44 × 8 =
  18. 18.74 × 8 =
  19. 19.17 × 8 =
  20. 20.66 × 8 =
  21. 21.126 × 4 =
  22. 22.126 × 4 =
  23. 23.20 × 8 =
  24. 24.13 × 4 =
  25. 25.158 × 4 =
  26. 26.19 × 4 =
  27. 27.26 × 8 =
  28. 28.36 × 8 =
  29. 29.24 × 4 =
  30. 30.146 × 4 =
  31. 31.44 × 4 =
  32. 32.55 × 8 =
  33. 33.74 × 8 =
  34. 34.30 × 4 =
  35. 35.73 × 8 =
  36. 36.40 × 8 =
  37. 37.28 × 8 =
  38. 38.30 × 8 =
  39. 39.151 × 4 =
  40. 40.107 × 4 =

Answer key

  1. 528
  2. 128
  3. 480
  4. 408
  5. 436
  6. 128
  7. 64
  8. 300
  9. 512
  10. 284
  11. 232
  12. 424
  13. 168
  14. 120
  15. 312
  16. 512
  17. 352
  18. 592
  19. 136
  20. 528
  21. 504
  22. 504
  23. 160
  24. 52
  25. 632
  26. 76
  27. 208
  28. 288
  29. 96
  30. 584
  31. 176
  32. 440
  33. 592
  34. 120
  35. 584
  36. 320
  37. 224
  38. 240
  39. 604
  40. 428

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