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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 892 · 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. 1.51 × 8 =
  2. 2.133 × 4 =
  3. 3.32 × 8 =
  4. 4.48 × 8 =
  5. 5.47 × 4 =
  6. 6.32 × 8 =
  7. 7.55 × 8 =
  8. 8.154 × 4 =
  9. 9.59 × 8 =
  10. 10.72 × 8 =
  11. 11.80 × 4 =
  12. 12.150 × 4 =
  13. 13.24 × 4 =
  14. 14.21 × 8 =
  15. 15.71 × 8 =
  16. 16.53 × 8 =
  17. 17.28 × 8 =
  18. 18.63 × 4 =
  19. 19.158 × 4 =
  20. 20.61 × 8 =
  21. 21.93 × 4 =
  22. 22.66 × 8 =
  23. 23.67 × 4 =
  24. 24.14 × 4 =
  25. 25.22 × 8 =
  26. 26.147 × 4 =
  27. 27.111 × 4 =
  28. 28.132 × 4 =
  29. 29.119 × 4 =
  30. 30.20 × 4 =
  31. 31.47 × 4 =
  32. 32.28 × 4 =
  33. 33.39 × 8 =
  34. 34.144 × 4 =
  35. 35.43 × 8 =
  36. 36.60 × 4 =
  37. 37.64 × 4 =
  38. 38.71 × 8 =
  39. 39.69 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 408
  2. 532
  3. 256
  4. 384
  5. 188
  6. 256
  7. 440
  8. 616
  9. 472
  10. 576
  11. 320
  12. 600
  13. 96
  14. 168
  15. 568
  16. 424
  17. 224
  18. 252
  19. 632
  20. 488
  21. 372
  22. 528
  23. 268
  24. 56
  25. 176
  26. 588
  27. 444
  28. 528
  29. 476
  30. 80
  31. 188
  32. 112
  33. 312
  34. 576
  35. 344
  36. 240
  37. 256
  38. 568
  39. 552
  40. 152

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