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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 722 · 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. 1.56 × 4 =
  2. 2.40 × 8 =
  3. 3.60 × 4 =
  4. 4.12 × 8 =
  5. 5.61 × 4 =
  6. 6.62 × 8 =
  7. 7.63 × 8 =
  8. 8.53 × 8 =
  9. 9.39 × 4 =
  10. 10.18 × 4 =
  11. 11.127 × 4 =
  12. 12.26 × 4 =
  13. 13.26 × 8 =
  14. 14.74 × 8 =
  15. 15.69 × 8 =
  16. 16.105 × 4 =
  17. 17.62 × 8 =
  18. 18.23 × 4 =
  19. 19.35 × 8 =
  20. 20.45 × 8 =
  21. 21.156 × 4 =
  22. 22.120 × 4 =
  23. 23.65 × 8 =
  24. 24.24 × 8 =
  25. 25.55 × 8 =
  26. 26.58 × 8 =
  27. 27.41 × 8 =
  28. 28.66 × 8 =
  29. 29.93 × 4 =
  30. 30.72 × 8 =
  31. 31.102 × 4 =
  32. 32.48 × 8 =
  33. 33.23 × 8 =
  34. 34.72 × 8 =
  35. 35.23 × 4 =
  36. 36.90 × 4 =
  37. 37.46 × 4 =
  38. 38.101 × 4 =
  39. 39.147 × 4 =
  40. 40.159 × 4 =

Answer key

  1. 224
  2. 320
  3. 240
  4. 96
  5. 244
  6. 496
  7. 504
  8. 424
  9. 156
  10. 72
  11. 508
  12. 104
  13. 208
  14. 592
  15. 552
  16. 420
  17. 496
  18. 92
  19. 280
  20. 360
  21. 624
  22. 480
  23. 520
  24. 192
  25. 440
  26. 464
  27. 328
  28. 528
  29. 372
  30. 576
  31. 408
  32. 384
  33. 184
  34. 576
  35. 92
  36. 360
  37. 184
  38. 404
  39. 588
  40. 636

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