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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 558 · 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. 1.149 × 4 =
  2. 2.101 × 4 =
  3. 3.63 × 8 =
  4. 4.13 × 8 =
  5. 5.71 × 4 =
  6. 6.137 × 4 =
  7. 7.63 × 8 =
  8. 8.29 × 8 =
  9. 9.15 × 4 =
  10. 10.60 × 8 =
  11. 11.68 × 8 =
  12. 12.82 × 4 =
  13. 13.155 × 4 =
  14. 14.55 × 8 =
  15. 15.17 × 8 =
  16. 16.18 × 8 =
  17. 17.64 × 8 =
  18. 18.17 × 4 =
  19. 19.73 × 8 =
  20. 20.18 × 4 =
  21. 21.23 × 4 =
  22. 22.34 × 4 =
  23. 23.30 × 8 =
  24. 24.27 × 8 =
  25. 25.131 × 4 =
  26. 26.87 × 4 =
  27. 27.31 × 8 =
  28. 28.127 × 4 =
  29. 29.45 × 8 =
  30. 30.38 × 4 =
  31. 31.18 × 8 =
  32. 32.24 × 8 =
  33. 33.151 × 4 =
  34. 34.24 × 4 =
  35. 35.71 × 8 =
  36. 36.50 × 8 =
  37. 37.27 × 8 =
  38. 38.25 × 8 =
  39. 39.134 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 596
  2. 404
  3. 504
  4. 104
  5. 284
  6. 548
  7. 504
  8. 232
  9. 60
  10. 480
  11. 544
  12. 328
  13. 620
  14. 440
  15. 136
  16. 144
  17. 512
  18. 68
  19. 584
  20. 72
  21. 92
  22. 136
  23. 240
  24. 216
  25. 524
  26. 348
  27. 248
  28. 508
  29. 360
  30. 152
  31. 144
  32. 192
  33. 604
  34. 96
  35. 568
  36. 400
  37. 216
  38. 200
  39. 536
  40. 240

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