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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 418 · 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. 1.61 × 8 =
  2. 2.150 × 4 =
  3. 3.70 × 8 =
  4. 4.16 × 8 =
  5. 5.26 × 8 =
  6. 6.18 × 4 =
  7. 7.23 × 8 =
  8. 8.18 × 8 =
  9. 9.20 × 8 =
  10. 10.71 × 8 =
  11. 11.121 × 4 =
  12. 12.72 × 8 =
  13. 13.96 × 4 =
  14. 14.159 × 4 =
  15. 15.35 × 4 =
  16. 16.59 × 8 =
  17. 17.72 × 4 =
  18. 18.49 × 8 =
  19. 19.64 × 8 =
  20. 20.61 × 8 =
  21. 21.133 × 4 =
  22. 22.61 × 8 =
  23. 23.135 × 4 =
  24. 24.61 × 8 =
  25. 25.32 × 8 =
  26. 26.51 × 8 =
  27. 27.15 × 4 =
  28. 28.56 × 8 =
  29. 29.42 × 4 =
  30. 30.78 × 4 =
  31. 31.28 × 4 =
  32. 32.72 × 8 =
  33. 33.22 × 4 =
  34. 34.71 × 8 =
  35. 35.51 × 8 =
  36. 36.18 × 8 =
  37. 37.124 × 4 =
  38. 38.30 × 8 =
  39. 39.63 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 488
  2. 600
  3. 560
  4. 128
  5. 208
  6. 72
  7. 184
  8. 144
  9. 160
  10. 568
  11. 484
  12. 576
  13. 384
  14. 636
  15. 140
  16. 472
  17. 288
  18. 392
  19. 512
  20. 488
  21. 532
  22. 488
  23. 540
  24. 488
  25. 256
  26. 408
  27. 60
  28. 448
  29. 168
  30. 312
  31. 112
  32. 576
  33. 88
  34. 568
  35. 408
  36. 144
  37. 496
  38. 240
  39. 252
  40. 68

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