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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 411 · 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. 1.41 × 8 =
  2. 2.70 × 4 =
  3. 3.159 × 4 =
  4. 4.25 × 8 =
  5. 5.131 × 4 =
  6. 6.47 × 8 =
  7. 7.83 × 4 =
  8. 8.133 × 4 =
  9. 9.67 × 4 =
  10. 10.129 × 4 =
  11. 11.39 × 4 =
  12. 12.68 × 8 =
  13. 13.142 × 4 =
  14. 14.36 × 8 =
  15. 15.96 × 4 =
  16. 16.32 × 4 =
  17. 17.112 × 4 =
  18. 18.75 × 8 =
  19. 19.24 × 4 =
  20. 20.12 × 8 =
  21. 21.105 × 4 =
  22. 22.29 × 4 =
  23. 23.56 × 8 =
  24. 24.17 × 8 =
  25. 25.38 × 8 =
  26. 26.31 × 8 =
  27. 27.34 × 8 =
  28. 28.89 × 4 =
  29. 29.47 × 8 =
  30. 30.35 × 4 =
  31. 31.15 × 8 =
  32. 32.62 × 8 =
  33. 33.33 × 8 =
  34. 34.30 × 8 =
  35. 35.59 × 8 =
  36. 36.98 × 4 =
  37. 37.70 × 8 =
  38. 38.24 × 8 =
  39. 39.17 × 8 =
  40. 40.61 × 8 =

Answer key

  1. 328
  2. 280
  3. 636
  4. 200
  5. 524
  6. 376
  7. 332
  8. 532
  9. 268
  10. 516
  11. 156
  12. 544
  13. 568
  14. 288
  15. 384
  16. 128
  17. 448
  18. 600
  19. 96
  20. 96
  21. 420
  22. 116
  23. 448
  24. 136
  25. 304
  26. 248
  27. 272
  28. 356
  29. 376
  30. 140
  31. 120
  32. 496
  33. 264
  34. 240
  35. 472
  36. 392
  37. 560
  38. 192
  39. 136
  40. 488

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