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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 886 · 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. 1.37 × 8 =
  2. 2.22 × 8 =
  3. 3.18 × 8 =
  4. 4.27 × 4 =
  5. 5.71 × 8 =
  6. 6.39 × 8 =
  7. 7.62 × 8 =
  8. 8.151 × 4 =
  9. 9.133 × 4 =
  10. 10.105 × 4 =
  11. 11.60 × 8 =
  12. 12.139 × 4 =
  13. 13.116 × 4 =
  14. 14.115 × 4 =
  15. 15.28 × 8 =
  16. 16.67 × 8 =
  17. 17.54 × 4 =
  18. 18.90 × 4 =
  19. 19.15 × 8 =
  20. 20.95 × 4 =
  21. 21.45 × 4 =
  22. 22.122 × 4 =
  23. 23.12 × 8 =
  24. 24.50 × 4 =
  25. 25.17 × 8 =
  26. 26.21 × 4 =
  27. 27.39 × 8 =
  28. 28.48 × 8 =
  29. 29.47 × 8 =
  30. 30.137 × 4 =
  31. 31.43 × 4 =
  32. 32.70 × 8 =
  33. 33.102 × 4 =
  34. 34.20 × 4 =
  35. 35.84 × 4 =
  36. 36.50 × 4 =
  37. 37.22 × 4 =
  38. 38.34 × 8 =
  39. 39.147 × 4 =
  40. 40.80 × 4 =

Answer key

  1. 296
  2. 176
  3. 144
  4. 108
  5. 568
  6. 312
  7. 496
  8. 604
  9. 532
  10. 420
  11. 480
  12. 556
  13. 464
  14. 460
  15. 224
  16. 536
  17. 216
  18. 360
  19. 120
  20. 380
  21. 180
  22. 488
  23. 96
  24. 200
  25. 136
  26. 84
  27. 312
  28. 384
  29. 376
  30. 548
  31. 172
  32. 560
  33. 408
  34. 80
  35. 336
  36. 200
  37. 88
  38. 272
  39. 588
  40. 320

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