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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 762 · 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. 1.104 × 4 =
  2. 2.26 × 8 =
  3. 3.160 × 4 =
  4. 4.16 × 8 =
  5. 5.27 × 8 =
  6. 6.63 × 4 =
  7. 7.28 × 8 =
  8. 8.28 × 4 =
  9. 9.141 × 4 =
  10. 10.128 × 4 =
  11. 11.122 × 4 =
  12. 12.15 × 8 =
  13. 13.75 × 8 =
  14. 14.34 × 8 =
  15. 15.73 × 8 =
  16. 16.14 × 8 =
  17. 17.17 × 4 =
  18. 18.37 × 4 =
  19. 19.130 × 4 =
  20. 20.128 × 4 =
  21. 21.69 × 8 =
  22. 22.47 × 4 =
  23. 23.64 × 8 =
  24. 24.66 × 8 =
  25. 25.24 × 8 =
  26. 26.66 × 8 =
  27. 27.74 × 8 =
  28. 28.21 × 4 =
  29. 29.109 × 4 =
  30. 30.61 × 8 =
  31. 31.140 × 4 =
  32. 32.73 × 8 =
  33. 33.12 × 8 =
  34. 34.23 × 4 =
  35. 35.29 × 4 =
  36. 36.17 × 8 =
  37. 37.17 × 4 =
  38. 38.45 × 8 =
  39. 39.33 × 8 =
  40. 40.42 × 8 =

Answer key

  1. 416
  2. 208
  3. 640
  4. 128
  5. 216
  6. 252
  7. 224
  8. 112
  9. 564
  10. 512
  11. 488
  12. 120
  13. 600
  14. 272
  15. 584
  16. 112
  17. 68
  18. 148
  19. 520
  20. 512
  21. 552
  22. 188
  23. 512
  24. 528
  25. 192
  26. 528
  27. 592
  28. 84
  29. 436
  30. 488
  31. 560
  32. 584
  33. 96
  34. 92
  35. 116
  36. 136
  37. 68
  38. 360
  39. 264
  40. 336

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