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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 795 · 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. 1.110 × 4 =
  2. 2.59 × 8 =
  3. 3.40 × 4 =
  4. 4.48 × 4 =
  5. 5.92 × 4 =
  6. 6.37 × 8 =
  7. 7.17 × 8 =
  8. 8.64 × 8 =
  9. 9.25 × 4 =
  10. 10.127 × 4 =
  11. 11.129 × 4 =
  12. 12.12 × 8 =
  13. 13.63 × 8 =
  14. 14.54 × 8 =
  15. 15.54 × 4 =
  16. 16.150 × 4 =
  17. 17.54 × 8 =
  18. 18.139 × 4 =
  19. 19.85 × 4 =
  20. 20.39 × 8 =
  21. 21.110 × 4 =
  22. 22.12 × 8 =
  23. 23.141 × 4 =
  24. 24.45 × 4 =
  25. 25.54 × 4 =
  26. 26.55 × 8 =
  27. 27.46 × 8 =
  28. 28.152 × 4 =
  29. 29.71 × 4 =
  30. 30.70 × 8 =
  31. 31.27 × 8 =
  32. 32.137 × 4 =
  33. 33.12 × 8 =
  34. 34.150 × 4 =
  35. 35.113 × 4 =
  36. 36.108 × 4 =
  37. 37.105 × 4 =
  38. 38.31 × 4 =
  39. 39.109 × 4 =
  40. 40.126 × 4 =

Answer key

  1. 440
  2. 472
  3. 160
  4. 192
  5. 368
  6. 296
  7. 136
  8. 512
  9. 100
  10. 508
  11. 516
  12. 96
  13. 504
  14. 432
  15. 216
  16. 600
  17. 432
  18. 556
  19. 340
  20. 312
  21. 440
  22. 96
  23. 564
  24. 180
  25. 216
  26. 440
  27. 368
  28. 608
  29. 284
  30. 560
  31. 216
  32. 548
  33. 96
  34. 600
  35. 452
  36. 432
  37. 420
  38. 124
  39. 436
  40. 504

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