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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 895 · 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. 1.125 × 4 =
  2. 2.23 × 4 =
  3. 3.119 × 4 =
  4. 4.36 × 4 =
  5. 5.71 × 8 =
  6. 6.133 × 4 =
  7. 7.127 × 4 =
  8. 8.50 × 4 =
  9. 9.85 × 4 =
  10. 10.63 × 8 =
  11. 11.15 × 8 =
  12. 12.64 × 8 =
  13. 13.70 × 8 =
  14. 14.70 × 8 =
  15. 15.60 × 8 =
  16. 16.15 × 8 =
  17. 17.128 × 4 =
  18. 18.27 × 8 =
  19. 19.35 × 8 =
  20. 20.69 × 8 =
  21. 21.60 × 4 =
  22. 22.71 × 4 =
  23. 23.89 × 4 =
  24. 24.152 × 4 =
  25. 25.22 × 4 =
  26. 26.34 × 8 =
  27. 27.12 × 8 =
  28. 28.14 × 8 =
  29. 29.15 × 8 =
  30. 30.57 × 8 =
  31. 31.29 × 8 =
  32. 32.130 × 4 =
  33. 33.54 × 8 =
  34. 34.97 × 4 =
  35. 35.16 × 8 =
  36. 36.41 × 8 =
  37. 37.53 × 8 =
  38. 38.49 × 8 =
  39. 39.142 × 4 =
  40. 40.65 × 8 =

Answer key

  1. 500
  2. 92
  3. 476
  4. 144
  5. 568
  6. 532
  7. 508
  8. 200
  9. 340
  10. 504
  11. 120
  12. 512
  13. 560
  14. 560
  15. 480
  16. 120
  17. 512
  18. 216
  19. 280
  20. 552
  21. 240
  22. 284
  23. 356
  24. 608
  25. 88
  26. 272
  27. 96
  28. 112
  29. 120
  30. 456
  31. 232
  32. 520
  33. 432
  34. 388
  35. 128
  36. 328
  37. 424
  38. 392
  39. 568
  40. 520

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