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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 930 · 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. 1.117 × 4 =
  2. 2.131 × 4 =
  3. 3.39 × 4 =
  4. 4.54 × 4 =
  5. 5.65 × 4 =
  6. 6.122 × 4 =
  7. 7.105 × 4 =
  8. 8.27 × 8 =
  9. 9.13 × 4 =
  10. 10.89 × 4 =
  11. 11.16 × 8 =
  12. 12.57 × 4 =
  13. 13.41 × 8 =
  14. 14.94 × 4 =
  15. 15.157 × 4 =
  16. 16.71 × 8 =
  17. 17.48 × 4 =
  18. 18.59 × 8 =
  19. 19.149 × 4 =
  20. 20.108 × 4 =
  21. 21.22 × 8 =
  22. 22.116 × 4 =
  23. 23.132 × 4 =
  24. 24.53 × 8 =
  25. 25.24 × 8 =
  26. 26.47 × 8 =
  27. 27.50 × 8 =
  28. 28.150 × 4 =
  29. 29.47 × 8 =
  30. 30.120 × 4 =
  31. 31.70 × 8 =
  32. 32.140 × 4 =
  33. 33.37 × 4 =
  34. 34.71 × 4 =
  35. 35.13 × 4 =
  36. 36.153 × 4 =
  37. 37.25 × 8 =
  38. 38.16 × 8 =
  39. 39.143 × 4 =
  40. 40.47 × 8 =

Answer key

  1. 468
  2. 524
  3. 156
  4. 216
  5. 260
  6. 488
  7. 420
  8. 216
  9. 52
  10. 356
  11. 128
  12. 228
  13. 328
  14. 376
  15. 628
  16. 568
  17. 192
  18. 472
  19. 596
  20. 432
  21. 176
  22. 464
  23. 528
  24. 424
  25. 192
  26. 376
  27. 400
  28. 600
  29. 376
  30. 480
  31. 560
  32. 560
  33. 148
  34. 284
  35. 52
  36. 612
  37. 200
  38. 128
  39. 572
  40. 376

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