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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 941 · 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. 1.29 × 4 =
  2. 2.51 × 8 =
  3. 3.13 × 8 =
  4. 4.75 × 8 =
  5. 5.56 × 8 =
  6. 6.66 × 8 =
  7. 7.47 × 8 =
  8. 8.72 × 8 =
  9. 9.104 × 4 =
  10. 10.26 × 4 =
  11. 11.62 × 4 =
  12. 12.35 × 4 =
  13. 13.156 × 4 =
  14. 14.41 × 8 =
  15. 15.42 × 8 =
  16. 16.44 × 8 =
  17. 17.18 × 4 =
  18. 18.32 × 8 =
  19. 19.25 × 4 =
  20. 20.28 × 4 =
  21. 21.19 × 8 =
  22. 22.20 × 8 =
  23. 23.69 × 4 =
  24. 24.68 × 8 =
  25. 25.90 × 4 =
  26. 26.135 × 4 =
  27. 27.15 × 4 =
  28. 28.50 × 4 =
  29. 29.47 × 8 =
  30. 30.73 × 8 =
  31. 31.65 × 8 =
  32. 32.60 × 4 =
  33. 33.63 × 8 =
  34. 34.111 × 4 =
  35. 35.74 × 8 =
  36. 36.58 × 4 =
  37. 37.29 × 4 =
  38. 38.32 × 8 =
  39. 39.134 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 116
  2. 408
  3. 104
  4. 600
  5. 448
  6. 528
  7. 376
  8. 576
  9. 416
  10. 104
  11. 248
  12. 140
  13. 624
  14. 328
  15. 336
  16. 352
  17. 72
  18. 256
  19. 100
  20. 112
  21. 152
  22. 160
  23. 276
  24. 544
  25. 360
  26. 540
  27. 60
  28. 200
  29. 376
  30. 584
  31. 520
  32. 240
  33. 504
  34. 444
  35. 592
  36. 232
  37. 116
  38. 256
  39. 536
  40. 440

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