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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 191 · 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. 1.13 × 8 =
  2. 2.15 × 4 =
  3. 3.38 × 8 =
  4. 4.67 × 8 =
  5. 5.13 × 8 =
  6. 6.61 × 8 =
  7. 7.57 × 4 =
  8. 8.75 × 8 =
  9. 9.64 × 8 =
  10. 10.144 × 4 =
  11. 11.55 × 8 =
  12. 12.42 × 8 =
  13. 13.147 × 4 =
  14. 14.148 × 4 =
  15. 15.70 × 8 =
  16. 16.46 × 8 =
  17. 17.61 × 4 =
  18. 18.13 × 8 =
  19. 19.129 × 4 =
  20. 20.61 × 8 =
  21. 21.14 × 8 =
  22. 22.22 × 8 =
  23. 23.138 × 4 =
  24. 24.42 × 8 =
  25. 25.21 × 4 =
  26. 26.66 × 8 =
  27. 27.39 × 8 =
  28. 28.22 × 4 =
  29. 29.119 × 4 =
  30. 30.108 × 4 =
  31. 31.20 × 8 =
  32. 32.81 × 4 =
  33. 33.66 × 8 =
  34. 34.76 × 4 =
  35. 35.75 × 4 =
  36. 36.83 × 4 =
  37. 37.53 × 8 =
  38. 38.75 × 4 =
  39. 39.68 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 104
  2. 60
  3. 304
  4. 536
  5. 104
  6. 488
  7. 228
  8. 600
  9. 512
  10. 576
  11. 440
  12. 336
  13. 588
  14. 592
  15. 560
  16. 368
  17. 244
  18. 104
  19. 516
  20. 488
  21. 112
  22. 176
  23. 552
  24. 336
  25. 84
  26. 528
  27. 312
  28. 88
  29. 476
  30. 432
  31. 160
  32. 324
  33. 528
  34. 304
  35. 300
  36. 332
  37. 424
  38. 300
  39. 544
  40. 192

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