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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 616 · 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. 1.130 × 4 =
  2. 2.57 × 8 =
  3. 3.41 × 8 =
  4. 4.68 × 8 =
  5. 5.50 × 8 =
  6. 6.60 × 8 =
  7. 7.160 × 4 =
  8. 8.63 × 4 =
  9. 9.21 × 8 =
  10. 10.48 × 8 =
  11. 11.66 × 8 =
  12. 12.42 × 4 =
  13. 13.52 × 8 =
  14. 14.24 × 4 =
  15. 15.30 × 8 =
  16. 16.89 × 4 =
  17. 17.60 × 8 =
  18. 18.139 × 4 =
  19. 19.104 × 4 =
  20. 20.38 × 8 =
  21. 21.15 × 4 =
  22. 22.25 × 8 =
  23. 23.61 × 8 =
  24. 24.67 × 8 =
  25. 25.62 × 8 =
  26. 26.14 × 8 =
  27. 27.156 × 4 =
  28. 28.40 × 8 =
  29. 29.80 × 4 =
  30. 30.24 × 4 =
  31. 31.47 × 8 =
  32. 32.159 × 4 =
  33. 33.41 × 8 =
  34. 34.37 × 4 =
  35. 35.108 × 4 =
  36. 36.27 × 4 =
  37. 37.66 × 8 =
  38. 38.25 × 4 =
  39. 39.71 × 8 =
  40. 40.101 × 4 =

Answer key

  1. 520
  2. 456
  3. 328
  4. 544
  5. 400
  6. 480
  7. 640
  8. 252
  9. 168
  10. 384
  11. 528
  12. 168
  13. 416
  14. 96
  15. 240
  16. 356
  17. 480
  18. 556
  19. 416
  20. 304
  21. 60
  22. 200
  23. 488
  24. 536
  25. 496
  26. 112
  27. 624
  28. 320
  29. 320
  30. 96
  31. 376
  32. 636
  33. 328
  34. 148
  35. 432
  36. 108
  37. 528
  38. 100
  39. 568
  40. 404

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