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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 155 · 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. 1.85 × 4 =
  2. 2.40 × 8 =
  3. 3.39 × 4 =
  4. 4.62 × 8 =
  5. 5.118 × 4 =
  6. 6.54 × 8 =
  7. 7.22 × 8 =
  8. 8.72 × 8 =
  9. 9.63 × 8 =
  10. 10.38 × 8 =
  11. 11.41 × 8 =
  12. 12.71 × 8 =
  13. 13.61 × 8 =
  14. 14.112 × 4 =
  15. 15.69 × 4 =
  16. 16.133 × 4 =
  17. 17.141 × 4 =
  18. 18.142 × 4 =
  19. 19.51 × 8 =
  20. 20.123 × 4 =
  21. 21.19 × 4 =
  22. 22.86 × 4 =
  23. 23.15 × 8 =
  24. 24.54 × 8 =
  25. 25.21 × 8 =
  26. 26.24 × 4 =
  27. 27.141 × 4 =
  28. 28.15 × 4 =
  29. 29.61 × 8 =
  30. 30.32 × 4 =
  31. 31.60 × 8 =
  32. 32.65 × 4 =
  33. 33.121 × 4 =
  34. 34.22 × 8 =
  35. 35.147 × 4 =
  36. 36.97 × 4 =
  37. 37.92 × 4 =
  38. 38.63 × 8 =
  39. 39.93 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 340
  2. 320
  3. 156
  4. 496
  5. 472
  6. 432
  7. 176
  8. 576
  9. 504
  10. 304
  11. 328
  12. 568
  13. 488
  14. 448
  15. 276
  16. 532
  17. 564
  18. 568
  19. 408
  20. 492
  21. 76
  22. 344
  23. 120
  24. 432
  25. 168
  26. 96
  27. 564
  28. 60
  29. 488
  30. 128
  31. 480
  32. 260
  33. 484
  34. 176
  35. 588
  36. 388
  37. 368
  38. 504
  39. 372
  40. 264

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