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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 705 · 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. 1.25 × 4 =
  2. 2.107 × 4 =
  3. 3.35 × 8 =
  4. 4.26 × 8 =
  5. 5.20 × 4 =
  6. 6.78 × 4 =
  7. 7.61 × 8 =
  8. 8.126 × 4 =
  9. 9.106 × 4 =
  10. 10.154 × 4 =
  11. 11.34 × 8 =
  12. 12.59 × 8 =
  13. 13.32 × 4 =
  14. 14.33 × 8 =
  15. 15.14 × 4 =
  16. 16.54 × 8 =
  17. 17.12 × 8 =
  18. 18.35 × 8 =
  19. 19.46 × 8 =
  20. 20.31 × 8 =
  21. 21.27 × 4 =
  22. 22.38 × 4 =
  23. 23.93 × 4 =
  24. 24.26 × 4 =
  25. 25.58 × 8 =
  26. 26.69 × 8 =
  27. 27.24 × 4 =
  28. 28.35 × 8 =
  29. 29.57 × 4 =
  30. 30.40 × 4 =
  31. 31.71 × 4 =
  32. 32.139 × 4 =
  33. 33.108 × 4 =
  34. 34.19 × 8 =
  35. 35.13 × 4 =
  36. 36.100 × 4 =
  37. 37.58 × 8 =
  38. 38.87 × 4 =
  39. 39.59 × 8 =
  40. 40.43 × 8 =

Answer key

  1. 100
  2. 428
  3. 280
  4. 208
  5. 80
  6. 312
  7. 488
  8. 504
  9. 424
  10. 616
  11. 272
  12. 472
  13. 128
  14. 264
  15. 56
  16. 432
  17. 96
  18. 280
  19. 368
  20. 248
  21. 108
  22. 152
  23. 372
  24. 104
  25. 464
  26. 552
  27. 96
  28. 280
  29. 228
  30. 160
  31. 284
  32. 556
  33. 432
  34. 152
  35. 52
  36. 400
  37. 464
  38. 348
  39. 472
  40. 344

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