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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 956 · 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. 1.65 × 8 =
  2. 2.40 × 8 =
  3. 3.119 × 4 =
  4. 4.55 × 8 =
  5. 5.148 × 4 =
  6. 6.52 × 4 =
  7. 7.64 × 8 =
  8. 8.45 × 8 =
  9. 9.44 × 4 =
  10. 10.69 × 8 =
  11. 11.70 × 4 =
  12. 12.25 × 8 =
  13. 13.52 × 8 =
  14. 14.66 × 8 =
  15. 15.14 × 4 =
  16. 16.27 × 8 =
  17. 17.26 × 8 =
  18. 18.116 × 4 =
  19. 19.71 × 8 =
  20. 20.149 × 4 =
  21. 21.104 × 4 =
  22. 22.148 × 4 =
  23. 23.63 × 4 =
  24. 24.43 × 4 =
  25. 25.34 × 8 =
  26. 26.103 × 4 =
  27. 27.19 × 8 =
  28. 28.139 × 4 =
  29. 29.154 × 4 =
  30. 30.48 × 4 =
  31. 31.21 × 4 =
  32. 32.66 × 8 =
  33. 33.55 × 4 =
  34. 34.63 × 8 =
  35. 35.75 × 8 =
  36. 36.34 × 8 =
  37. 37.61 × 8 =
  38. 38.14 × 8 =
  39. 39.12 × 8 =
  40. 40.51 × 8 =

Answer key

  1. 520
  2. 320
  3. 476
  4. 440
  5. 592
  6. 208
  7. 512
  8. 360
  9. 176
  10. 552
  11. 280
  12. 200
  13. 416
  14. 528
  15. 56
  16. 216
  17. 208
  18. 464
  19. 568
  20. 596
  21. 416
  22. 592
  23. 252
  24. 172
  25. 272
  26. 412
  27. 152
  28. 556
  29. 616
  30. 192
  31. 84
  32. 528
  33. 220
  34. 504
  35. 600
  36. 272
  37. 488
  38. 112
  39. 96
  40. 408

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