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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 764 · 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. 1.147 × 4 =
  2. 2.143 × 4 =
  3. 3.72 × 8 =
  4. 4.36 × 4 =
  5. 5.144 × 4 =
  6. 6.43 × 4 =
  7. 7.18 × 4 =
  8. 8.50 × 8 =
  9. 9.105 × 4 =
  10. 10.67 × 4 =
  11. 11.43 × 4 =
  12. 12.143 × 4 =
  13. 13.26 × 4 =
  14. 14.86 × 4 =
  15. 15.138 × 4 =
  16. 16.155 × 4 =
  17. 17.60 × 4 =
  18. 18.49 × 8 =
  19. 19.106 × 4 =
  20. 20.109 × 4 =
  21. 21.53 × 4 =
  22. 22.110 × 4 =
  23. 23.82 × 4 =
  24. 24.61 × 8 =
  25. 25.157 × 4 =
  26. 26.27 × 8 =
  27. 27.152 × 4 =
  28. 28.66 × 8 =
  29. 29.159 × 4 =
  30. 30.57 × 8 =
  31. 31.55 × 8 =
  32. 32.50 × 8 =
  33. 33.36 × 4 =
  34. 34.137 × 4 =
  35. 35.27 × 4 =
  36. 36.26 × 8 =
  37. 37.89 × 4 =
  38. 38.24 × 8 =
  39. 39.25 × 8 =
  40. 40.58 × 8 =

Answer key

  1. 588
  2. 572
  3. 576
  4. 144
  5. 576
  6. 172
  7. 72
  8. 400
  9. 420
  10. 268
  11. 172
  12. 572
  13. 104
  14. 344
  15. 552
  16. 620
  17. 240
  18. 392
  19. 424
  20. 436
  21. 212
  22. 440
  23. 328
  24. 488
  25. 628
  26. 216
  27. 608
  28. 528
  29. 636
  30. 456
  31. 440
  32. 400
  33. 144
  34. 548
  35. 108
  36. 208
  37. 356
  38. 192
  39. 200
  40. 464

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