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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 899 · 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. 1.46 × 8 =
  2. 2.158 × 4 =
  3. 3.66 × 8 =
  4. 4.16 × 4 =
  5. 5.26 × 8 =
  6. 6.71 × 8 =
  7. 7.21 × 4 =
  8. 8.23 × 4 =
  9. 9.12 × 8 =
  10. 10.41 × 8 =
  11. 11.32 × 8 =
  12. 12.26 × 8 =
  13. 13.146 × 4 =
  14. 14.16 × 4 =
  15. 15.73 × 4 =
  16. 16.31 × 4 =
  17. 17.15 × 8 =
  18. 18.21 × 8 =
  19. 19.34 × 4 =
  20. 20.104 × 4 =
  21. 21.21 × 4 =
  22. 22.42 × 4 =
  23. 23.61 × 8 =
  24. 24.59 × 8 =
  25. 25.18 × 8 =
  26. 26.42 × 8 =
  27. 27.97 × 4 =
  28. 28.117 × 4 =
  29. 29.37 × 8 =
  30. 30.104 × 4 =
  31. 31.45 × 4 =
  32. 32.64 × 4 =
  33. 33.14 × 4 =
  34. 34.69 × 8 =
  35. 35.26 × 8 =
  36. 36.52 × 8 =
  37. 37.41 × 4 =
  38. 38.33 × 8 =
  39. 39.32 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 368
  2. 632
  3. 528
  4. 64
  5. 208
  6. 568
  7. 84
  8. 92
  9. 96
  10. 328
  11. 256
  12. 208
  13. 584
  14. 64
  15. 292
  16. 124
  17. 120
  18. 168
  19. 136
  20. 416
  21. 84
  22. 168
  23. 488
  24. 472
  25. 144
  26. 336
  27. 388
  28. 468
  29. 296
  30. 416
  31. 180
  32. 256
  33. 56
  34. 552
  35. 208
  36. 416
  37. 164
  38. 264
  39. 128
  40. 232

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