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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 942 · 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. 1.19 × 8 =
  2. 2.52 × 8 =
  3. 3.144 × 4 =
  4. 4.154 × 4 =
  5. 5.23 × 8 =
  6. 6.66 × 8 =
  7. 7.85 × 4 =
  8. 8.15 × 4 =
  9. 9.47 × 4 =
  10. 10.68 × 8 =
  11. 11.91 × 4 =
  12. 12.32 × 8 =
  13. 13.29 × 8 =
  14. 14.39 × 8 =
  15. 15.30 × 8 =
  16. 16.110 × 4 =
  17. 17.87 × 4 =
  18. 18.93 × 4 =
  19. 19.150 × 4 =
  20. 20.55 × 4 =
  21. 21.114 × 4 =
  22. 22.18 × 4 =
  23. 23.59 × 8 =
  24. 24.35 × 8 =
  25. 25.71 × 4 =
  26. 26.59 × 8 =
  27. 27.51 × 8 =
  28. 28.148 × 4 =
  29. 29.33 × 8 =
  30. 30.27 × 4 =
  31. 31.69 × 8 =
  32. 32.118 × 4 =
  33. 33.45 × 8 =
  34. 34.100 × 4 =
  35. 35.75 × 8 =
  36. 36.71 × 8 =
  37. 37.101 × 4 =
  38. 38.27 × 8 =
  39. 39.51 × 8 =
  40. 40.48 × 8 =

Answer key

  1. 152
  2. 416
  3. 576
  4. 616
  5. 184
  6. 528
  7. 340
  8. 60
  9. 188
  10. 544
  11. 364
  12. 256
  13. 232
  14. 312
  15. 240
  16. 440
  17. 348
  18. 372
  19. 600
  20. 220
  21. 456
  22. 72
  23. 472
  24. 280
  25. 284
  26. 472
  27. 408
  28. 592
  29. 264
  30. 108
  31. 552
  32. 472
  33. 360
  34. 400
  35. 600
  36. 568
  37. 404
  38. 216
  39. 408
  40. 384

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