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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 979 · 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. 1.27 × 8 =
  2. 2.74 × 8 =
  3. 3.64 × 4 =
  4. 4.26 × 8 =
  5. 5.49 × 8 =
  6. 6.87 × 4 =
  7. 7.32 × 4 =
  8. 8.29 × 8 =
  9. 9.40 × 4 =
  10. 10.83 × 4 =
  11. 11.116 × 4 =
  12. 12.139 × 4 =
  13. 13.44 × 8 =
  14. 14.27 × 4 =
  15. 15.149 × 4 =
  16. 16.108 × 4 =
  17. 17.44 × 8 =
  18. 18.49 × 4 =
  19. 19.30 × 8 =
  20. 20.25 × 8 =
  21. 21.24 × 8 =
  22. 22.34 × 4 =
  23. 23.15 × 8 =
  24. 24.65 × 8 =
  25. 25.36 × 4 =
  26. 26.71 × 8 =
  27. 27.43 × 8 =
  28. 28.18 × 4 =
  29. 29.26 × 4 =
  30. 30.15 × 8 =
  31. 31.52 × 8 =
  32. 32.118 × 4 =
  33. 33.68 × 4 =
  34. 34.147 × 4 =
  35. 35.15 × 8 =
  36. 36.110 × 4 =
  37. 37.59 × 8 =
  38. 38.153 × 4 =
  39. 39.44 × 4 =
  40. 40.155 × 4 =

Answer key

  1. 216
  2. 592
  3. 256
  4. 208
  5. 392
  6. 348
  7. 128
  8. 232
  9. 160
  10. 332
  11. 464
  12. 556
  13. 352
  14. 108
  15. 596
  16. 432
  17. 352
  18. 196
  19. 240
  20. 200
  21. 192
  22. 136
  23. 120
  24. 520
  25. 144
  26. 568
  27. 344
  28. 72
  29. 104
  30. 120
  31. 416
  32. 472
  33. 272
  34. 588
  35. 120
  36. 440
  37. 472
  38. 612
  39. 176
  40. 620

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