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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 396 · 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. 1.42 × 8 =
  2. 2.38 × 4 =
  3. 3.61 × 8 =
  4. 4.55 × 4 =
  5. 5.48 × 4 =
  6. 6.13 × 8 =
  7. 7.121 × 4 =
  8. 8.52 × 8 =
  9. 9.160 × 4 =
  10. 10.136 × 4 =
  11. 11.72 × 8 =
  12. 12.89 × 4 =
  13. 13.152 × 4 =
  14. 14.74 × 8 =
  15. 15.61 × 8 =
  16. 16.57 × 4 =
  17. 17.14 × 8 =
  18. 18.39 × 8 =
  19. 19.29 × 8 =
  20. 20.36 × 8 =
  21. 21.160 × 4 =
  22. 22.160 × 4 =
  23. 23.98 × 4 =
  24. 24.123 × 4 =
  25. 25.142 × 4 =
  26. 26.82 × 4 =
  27. 27.125 × 4 =
  28. 28.141 × 4 =
  29. 29.22 × 8 =
  30. 30.50 × 8 =
  31. 31.12 × 8 =
  32. 32.28 × 8 =
  33. 33.58 × 4 =
  34. 34.19 × 4 =
  35. 35.118 × 4 =
  36. 36.31 × 8 =
  37. 37.136 × 4 =
  38. 38.44 × 8 =
  39. 39.64 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 336
  2. 152
  3. 488
  4. 220
  5. 192
  6. 104
  7. 484
  8. 416
  9. 640
  10. 544
  11. 576
  12. 356
  13. 608
  14. 592
  15. 488
  16. 228
  17. 112
  18. 312
  19. 232
  20. 288
  21. 640
  22. 640
  23. 392
  24. 492
  25. 568
  26. 328
  27. 500
  28. 564
  29. 176
  30. 400
  31. 96
  32. 224
  33. 232
  34. 76
  35. 472
  36. 248
  37. 544
  38. 352
  39. 512
  40. 168

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