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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 56 · 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. 2.68 × 8 =
  3. 3.27 × 4 =
  4. 4.97 × 4 =
  5. 5.41 × 8 =
  6. 6.68 × 8 =
  7. 7.19 × 8 =
  8. 8.65 × 8 =
  9. 9.36 × 4 =
  10. 10.121 × 4 =
  11. 11.40 × 4 =
  12. 12.90 × 4 =
  13. 13.38 × 4 =
  14. 14.53 × 8 =
  15. 15.109 × 4 =
  16. 16.150 × 4 =
  17. 17.39 × 4 =
  18. 18.42 × 4 =
  19. 19.48 × 8 =
  20. 20.57 × 8 =
  21. 21.34 × 4 =
  22. 22.61 × 8 =
  23. 23.159 × 4 =
  24. 24.33 × 4 =
  25. 25.12 × 8 =
  26. 26.69 × 8 =
  27. 27.12 × 8 =
  28. 28.114 × 4 =
  29. 29.25 × 4 =
  30. 30.40 × 8 =
  31. 31.36 × 8 =
  32. 32.61 × 4 =
  33. 33.57 × 8 =
  34. 34.128 × 4 =
  35. 35.55 × 8 =
  36. 36.28 × 4 =
  37. 37.95 × 4 =
  38. 38.101 × 4 =
  39. 39.129 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 488
  2. 544
  3. 108
  4. 388
  5. 328
  6. 544
  7. 152
  8. 520
  9. 144
  10. 484
  11. 160
  12. 360
  13. 152
  14. 424
  15. 436
  16. 600
  17. 156
  18. 168
  19. 384
  20. 456
  21. 136
  22. 488
  23. 636
  24. 132
  25. 96
  26. 552
  27. 96
  28. 456
  29. 100
  30. 320
  31. 288
  32. 244
  33. 456
  34. 512
  35. 440
  36. 112
  37. 380
  38. 404
  39. 516
  40. 64

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