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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 458 · 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. 1.42 × 4 =
  2. 2.64 × 8 =
  3. 3.94 × 4 =
  4. 4.59 × 8 =
  5. 5.96 × 4 =
  6. 6.140 × 4 =
  7. 7.17 × 8 =
  8. 8.46 × 4 =
  9. 9.58 × 8 =
  10. 10.31 × 8 =
  11. 11.65 × 8 =
  12. 12.58 × 8 =
  13. 13.25 × 8 =
  14. 14.87 × 4 =
  15. 15.144 × 4 =
  16. 16.56 × 4 =
  17. 17.15 × 4 =
  18. 18.47 × 4 =
  19. 19.88 × 4 =
  20. 20.57 × 8 =
  21. 21.27 × 4 =
  22. 22.147 × 4 =
  23. 23.62 × 4 =
  24. 24.30 × 8 =
  25. 25.15 × 8 =
  26. 26.20 × 8 =
  27. 27.142 × 4 =
  28. 28.94 × 4 =
  29. 29.35 × 8 =
  30. 30.38 × 8 =
  31. 31.117 × 4 =
  32. 32.95 × 4 =
  33. 33.60 × 8 =
  34. 34.149 × 4 =
  35. 35.28 × 4 =
  36. 36.51 × 4 =
  37. 37.118 × 4 =
  38. 38.57 × 8 =
  39. 39.27 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 168
  2. 512
  3. 376
  4. 472
  5. 384
  6. 560
  7. 136
  8. 184
  9. 464
  10. 248
  11. 520
  12. 464
  13. 200
  14. 348
  15. 576
  16. 224
  17. 60
  18. 188
  19. 352
  20. 456
  21. 108
  22. 588
  23. 248
  24. 240
  25. 120
  26. 160
  27. 568
  28. 376
  29. 280
  30. 304
  31. 468
  32. 380
  33. 480
  34. 596
  35. 112
  36. 204
  37. 472
  38. 456
  39. 216
  40. 272

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