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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 684 · 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. 1.59 × 8 =
  2. 2.73 × 8 =
  3. 3.70 × 8 =
  4. 4.44 × 4 =
  5. 5.155 × 4 =
  6. 6.34 × 8 =
  7. 7.36 × 8 =
  8. 8.65 × 8 =
  9. 9.77 × 4 =
  10. 10.136 × 4 =
  11. 11.132 × 4 =
  12. 12.80 × 4 =
  13. 13.42 × 4 =
  14. 14.129 × 4 =
  15. 15.13 × 8 =
  16. 16.54 × 4 =
  17. 17.160 × 4 =
  18. 18.27 × 8 =
  19. 19.134 × 4 =
  20. 20.80 × 4 =
  21. 21.43 × 8 =
  22. 22.55 × 4 =
  23. 23.59 × 8 =
  24. 24.67 × 8 =
  25. 25.27 × 8 =
  26. 26.52 × 8 =
  27. 27.144 × 4 =
  28. 28.19 × 8 =
  29. 29.59 × 8 =
  30. 30.88 × 4 =
  31. 31.40 × 4 =
  32. 32.66 × 4 =
  33. 33.115 × 4 =
  34. 34.24 × 4 =
  35. 35.36 × 8 =
  36. 36.73 × 4 =
  37. 37.127 × 4 =
  38. 38.42 × 8 =
  39. 39.157 × 4 =
  40. 40.49 × 4 =

Answer key

  1. 472
  2. 584
  3. 560
  4. 176
  5. 620
  6. 272
  7. 288
  8. 520
  9. 308
  10. 544
  11. 528
  12. 320
  13. 168
  14. 516
  15. 104
  16. 216
  17. 640
  18. 216
  19. 536
  20. 320
  21. 344
  22. 220
  23. 472
  24. 536
  25. 216
  26. 416
  27. 576
  28. 152
  29. 472
  30. 352
  31. 160
  32. 264
  33. 460
  34. 96
  35. 288
  36. 292
  37. 508
  38. 336
  39. 628
  40. 196

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