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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 998 · 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. 1.102 × 4 =
  2. 2.56 × 8 =
  3. 3.24 × 8 =
  4. 4.47 × 4 =
  5. 5.72 × 8 =
  6. 6.114 × 4 =
  7. 7.17 × 8 =
  8. 8.160 × 4 =
  9. 9.13 × 8 =
  10. 10.33 × 4 =
  11. 11.51 × 8 =
  12. 12.35 × 8 =
  13. 13.71 × 4 =
  14. 14.66 × 4 =
  15. 15.24 × 8 =
  16. 16.70 × 4 =
  17. 17.150 × 4 =
  18. 18.63 × 4 =
  19. 19.63 × 8 =
  20. 20.133 × 4 =
  21. 21.22 × 8 =
  22. 22.74 × 8 =
  23. 23.19 × 8 =
  24. 24.64 × 8 =
  25. 25.26 × 8 =
  26. 26.29 × 4 =
  27. 27.115 × 4 =
  28. 28.12 × 8 =
  29. 29.23 × 4 =
  30. 30.45 × 8 =
  31. 31.144 × 4 =
  32. 32.23 × 4 =
  33. 33.68 × 8 =
  34. 34.141 × 4 =
  35. 35.96 × 4 =
  36. 36.97 × 4 =
  37. 37.102 × 4 =
  38. 38.24 × 8 =
  39. 39.70 × 8 =
  40. 40.48 × 8 =

Answer key

  1. 408
  2. 448
  3. 192
  4. 188
  5. 576
  6. 456
  7. 136
  8. 640
  9. 104
  10. 132
  11. 408
  12. 280
  13. 284
  14. 264
  15. 192
  16. 280
  17. 600
  18. 252
  19. 504
  20. 532
  21. 176
  22. 592
  23. 152
  24. 512
  25. 208
  26. 116
  27. 460
  28. 96
  29. 92
  30. 360
  31. 576
  32. 92
  33. 544
  34. 564
  35. 384
  36. 388
  37. 408
  38. 192
  39. 560
  40. 384

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