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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 366 · 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. 1.140 × 4 =
  2. 2.61 × 8 =
  3. 3.26 × 4 =
  4. 4.56 × 8 =
  5. 5.63 × 4 =
  6. 6.18 × 8 =
  7. 7.39 × 8 =
  8. 8.129 × 4 =
  9. 9.55 × 8 =
  10. 10.105 × 4 =
  11. 11.12 × 8 =
  12. 12.13 × 8 =
  13. 13.67 × 8 =
  14. 14.75 × 8 =
  15. 15.27 × 8 =
  16. 16.57 × 8 =
  17. 17.25 × 8 =
  18. 18.136 × 4 =
  19. 19.41 × 4 =
  20. 20.12 × 8 =
  21. 21.15 × 8 =
  22. 22.40 × 8 =
  23. 23.69 × 8 =
  24. 24.96 × 4 =
  25. 25.69 × 8 =
  26. 26.35 × 8 =
  27. 27.30 × 8 =
  28. 28.133 × 4 =
  29. 29.43 × 8 =
  30. 30.35 × 8 =
  31. 31.127 × 4 =
  32. 32.66 × 8 =
  33. 33.60 × 8 =
  34. 34.46 × 4 =
  35. 35.60 × 4 =
  36. 36.20 × 8 =
  37. 37.75 × 4 =
  38. 38.46 × 8 =
  39. 39.18 × 4 =
  40. 40.65 × 8 =

Answer key

  1. 560
  2. 488
  3. 104
  4. 448
  5. 252
  6. 144
  7. 312
  8. 516
  9. 440
  10. 420
  11. 96
  12. 104
  13. 536
  14. 600
  15. 216
  16. 456
  17. 200
  18. 544
  19. 164
  20. 96
  21. 120
  22. 320
  23. 552
  24. 384
  25. 552
  26. 280
  27. 240
  28. 532
  29. 344
  30. 280
  31. 508
  32. 528
  33. 480
  34. 184
  35. 240
  36. 160
  37. 300
  38. 368
  39. 72
  40. 520

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