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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 564 · 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. 1.122 × 4 =
  2. 2.50 × 8 =
  3. 3.108 × 4 =
  4. 4.52 × 4 =
  5. 5.24 × 8 =
  6. 6.30 × 4 =
  7. 7.60 × 8 =
  8. 8.52 × 4 =
  9. 9.24 × 8 =
  10. 10.27 × 8 =
  11. 11.92 × 4 =
  12. 12.55 × 8 =
  13. 13.51 × 8 =
  14. 14.89 × 4 =
  15. 15.16 × 8 =
  16. 16.66 × 8 =
  17. 17.110 × 4 =
  18. 18.128 × 4 =
  19. 19.50 × 8 =
  20. 20.74 × 4 =
  21. 21.63 × 4 =
  22. 22.16 × 4 =
  23. 23.67 × 8 =
  24. 24.70 × 8 =
  25. 25.47 × 8 =
  26. 26.46 × 8 =
  27. 27.35 × 8 =
  28. 28.20 × 8 =
  29. 29.14 × 8 =
  30. 30.25 × 4 =
  31. 31.20 × 8 =
  32. 32.64 × 4 =
  33. 33.48 × 8 =
  34. 34.15 × 8 =
  35. 35.55 × 8 =
  36. 36.43 × 8 =
  37. 37.66 × 8 =
  38. 38.64 × 4 =
  39. 39.60 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 488
  2. 400
  3. 432
  4. 208
  5. 192
  6. 120
  7. 480
  8. 208
  9. 192
  10. 216
  11. 368
  12. 440
  13. 408
  14. 356
  15. 128
  16. 528
  17. 440
  18. 512
  19. 400
  20. 296
  21. 252
  22. 64
  23. 536
  24. 560
  25. 376
  26. 368
  27. 280
  28. 160
  29. 112
  30. 100
  31. 160
  32. 256
  33. 384
  34. 120
  35. 440
  36. 344
  37. 528
  38. 256
  39. 480
  40. 284

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