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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 953 · 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. 1.18 × 8 =
  2. 2.68 × 8 =
  3. 3.40 × 8 =
  4. 4.45 × 8 =
  5. 5.24 × 8 =
  6. 6.67 × 8 =
  7. 7.53 × 8 =
  8. 8.139 × 4 =
  9. 9.14 × 4 =
  10. 10.70 × 8 =
  11. 11.14 × 4 =
  12. 12.31 × 8 =
  13. 13.33 × 4 =
  14. 14.91 × 4 =
  15. 15.59 × 8 =
  16. 16.23 × 4 =
  17. 17.14 × 8 =
  18. 18.72 × 8 =
  19. 19.16 × 4 =
  20. 20.20 × 4 =
  21. 21.73 × 4 =
  22. 22.158 × 4 =
  23. 23.142 × 4 =
  24. 24.131 × 4 =
  25. 25.60 × 4 =
  26. 26.38 × 4 =
  27. 27.54 × 8 =
  28. 28.33 × 8 =
  29. 29.55 × 4 =
  30. 30.120 × 4 =
  31. 31.32 × 8 =
  32. 32.45 × 8 =
  33. 33.61 × 4 =
  34. 34.57 × 4 =
  35. 35.71 × 8 =
  36. 36.64 × 8 =
  37. 37.66 × 8 =
  38. 38.50 × 8 =
  39. 39.29 × 8 =
  40. 40.121 × 4 =

Answer key

  1. 144
  2. 544
  3. 320
  4. 360
  5. 192
  6. 536
  7. 424
  8. 556
  9. 56
  10. 560
  11. 56
  12. 248
  13. 132
  14. 364
  15. 472
  16. 92
  17. 112
  18. 576
  19. 64
  20. 80
  21. 292
  22. 632
  23. 568
  24. 524
  25. 240
  26. 152
  27. 432
  28. 264
  29. 220
  30. 480
  31. 256
  32. 360
  33. 244
  34. 228
  35. 568
  36. 512
  37. 528
  38. 400
  39. 232
  40. 484

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