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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 424 · 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. 1.144 × 4 =
  2. 2.13 × 8 =
  3. 3.142 × 4 =
  4. 4.142 × 4 =
  5. 5.84 × 4 =
  6. 6.50 × 4 =
  7. 7.43 × 8 =
  8. 8.20 × 8 =
  9. 9.62 × 8 =
  10. 10.93 × 4 =
  11. 11.53 × 8 =
  12. 12.110 × 4 =
  13. 13.55 × 8 =
  14. 14.47 × 8 =
  15. 15.117 × 4 =
  16. 16.147 × 4 =
  17. 17.143 × 4 =
  18. 18.119 × 4 =
  19. 19.143 × 4 =
  20. 20.35 × 8 =
  21. 21.13 × 8 =
  22. 22.25 × 8 =
  23. 23.23 × 8 =
  24. 24.51 × 8 =
  25. 25.24 × 8 =
  26. 26.97 × 4 =
  27. 27.26 × 8 =
  28. 28.75 × 8 =
  29. 29.104 × 4 =
  30. 30.30 × 4 =
  31. 31.15 × 4 =
  32. 32.96 × 4 =
  33. 33.21 × 4 =
  34. 34.30 × 8 =
  35. 35.56 × 8 =
  36. 36.121 × 4 =
  37. 37.117 × 4 =
  38. 38.66 × 8 =
  39. 39.29 × 8 =
  40. 40.149 × 4 =

Answer key

  1. 576
  2. 104
  3. 568
  4. 568
  5. 336
  6. 200
  7. 344
  8. 160
  9. 496
  10. 372
  11. 424
  12. 440
  13. 440
  14. 376
  15. 468
  16. 588
  17. 572
  18. 476
  19. 572
  20. 280
  21. 104
  22. 200
  23. 184
  24. 408
  25. 192
  26. 388
  27. 208
  28. 600
  29. 416
  30. 120
  31. 60
  32. 384
  33. 84
  34. 240
  35. 448
  36. 484
  37. 468
  38. 528
  39. 232
  40. 596

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