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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 208 · 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. 1.17 × 4 =
  2. 2.40 × 4 =
  3. 3.74 × 4 =
  4. 4.53 × 8 =
  5. 5.42 × 8 =
  6. 6.26 × 8 =
  7. 7.72 × 8 =
  8. 8.134 × 4 =
  9. 9.23 × 4 =
  10. 10.19 × 4 =
  11. 11.104 × 4 =
  12. 12.60 × 4 =
  13. 13.53 × 4 =
  14. 14.30 × 4 =
  15. 15.23 × 8 =
  16. 16.24 × 8 =
  17. 17.18 × 4 =
  18. 18.143 × 4 =
  19. 19.159 × 4 =
  20. 20.86 × 4 =
  21. 21.133 × 4 =
  22. 22.98 × 4 =
  23. 23.33 × 4 =
  24. 24.86 × 4 =
  25. 25.112 × 4 =
  26. 26.131 × 4 =
  27. 27.34 × 8 =
  28. 28.68 × 8 =
  29. 29.23 × 8 =
  30. 30.59 × 8 =
  31. 31.54 × 8 =
  32. 32.128 × 4 =
  33. 33.70 × 4 =
  34. 34.105 × 4 =
  35. 35.105 × 4 =
  36. 36.25 × 8 =
  37. 37.64 × 8 =
  38. 38.66 × 8 =
  39. 39.44 × 8 =
  40. 40.109 × 4 =

Answer key

  1. 68
  2. 160
  3. 296
  4. 424
  5. 336
  6. 208
  7. 576
  8. 536
  9. 92
  10. 76
  11. 416
  12. 240
  13. 212
  14. 120
  15. 184
  16. 192
  17. 72
  18. 572
  19. 636
  20. 344
  21. 532
  22. 392
  23. 132
  24. 344
  25. 448
  26. 524
  27. 272
  28. 544
  29. 184
  30. 472
  31. 432
  32. 512
  33. 280
  34. 420
  35. 420
  36. 200
  37. 512
  38. 528
  39. 352
  40. 436

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