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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 159 · 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. 1.35 × 8 =
  2. 2.24 × 8 =
  3. 3.31 × 4 =
  4. 4.42 × 4 =
  5. 5.97 × 4 =
  6. 6.87 × 4 =
  7. 7.116 × 4 =
  8. 8.116 × 4 =
  9. 9.65 × 8 =
  10. 10.36 × 4 =
  11. 11.15 × 8 =
  12. 12.12 × 8 =
  13. 13.14 × 8 =
  14. 14.52 × 8 =
  15. 15.31 × 8 =
  16. 16.144 × 4 =
  17. 17.13 × 8 =
  18. 18.31 × 4 =
  19. 19.72 × 8 =
  20. 20.71 × 8 =
  21. 21.47 × 8 =
  22. 22.68 × 8 =
  23. 23.137 × 4 =
  24. 24.34 × 4 =
  25. 25.53 × 8 =
  26. 26.140 × 4 =
  27. 27.42 × 8 =
  28. 28.71 × 8 =
  29. 29.144 × 4 =
  30. 30.38 × 8 =
  31. 31.39 × 8 =
  32. 32.100 × 4 =
  33. 33.120 × 4 =
  34. 34.20 × 4 =
  35. 35.53 × 4 =
  36. 36.74 × 8 =
  37. 37.54 × 8 =
  38. 38.56 × 8 =
  39. 39.26 × 8 =
  40. 40.19 × 4 =

Answer key

  1. 280
  2. 192
  3. 124
  4. 168
  5. 388
  6. 348
  7. 464
  8. 464
  9. 520
  10. 144
  11. 120
  12. 96
  13. 112
  14. 416
  15. 248
  16. 576
  17. 104
  18. 124
  19. 576
  20. 568
  21. 376
  22. 544
  23. 548
  24. 136
  25. 424
  26. 560
  27. 336
  28. 568
  29. 576
  30. 304
  31. 312
  32. 400
  33. 480
  34. 80
  35. 212
  36. 592
  37. 432
  38. 448
  39. 208
  40. 76

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