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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 227 · 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. 1.20 × 4 =
  2. 2.47 × 8 =
  3. 3.42 × 8 =
  4. 4.109 × 4 =
  5. 5.27 × 8 =
  6. 6.28 × 8 =
  7. 7.139 × 4 =
  8. 8.24 × 8 =
  9. 9.68 × 8 =
  10. 10.72 × 4 =
  11. 11.51 × 4 =
  12. 12.78 × 4 =
  13. 13.36 × 8 =
  14. 14.78 × 4 =
  15. 15.135 × 4 =
  16. 16.52 × 8 =
  17. 17.116 × 4 =
  18. 18.71 × 4 =
  19. 19.96 × 4 =
  20. 20.17 × 4 =
  21. 21.66 × 8 =
  22. 22.118 × 4 =
  23. 23.17 × 8 =
  24. 24.149 × 4 =
  25. 25.69 × 8 =
  26. 26.37 × 4 =
  27. 27.14 × 8 =
  28. 28.57 × 8 =
  29. 29.12 × 8 =
  30. 30.58 × 4 =
  31. 31.13 × 8 =
  32. 32.44 × 4 =
  33. 33.126 × 4 =
  34. 34.24 × 8 =
  35. 35.21 × 4 =
  36. 36.105 × 4 =
  37. 37.23 × 4 =
  38. 38.142 × 4 =
  39. 39.131 × 4 =
  40. 40.48 × 4 =

Answer key

  1. 80
  2. 376
  3. 336
  4. 436
  5. 216
  6. 224
  7. 556
  8. 192
  9. 544
  10. 288
  11. 204
  12. 312
  13. 288
  14. 312
  15. 540
  16. 416
  17. 464
  18. 284
  19. 384
  20. 68
  21. 528
  22. 472
  23. 136
  24. 596
  25. 552
  26. 148
  27. 112
  28. 456
  29. 96
  30. 232
  31. 104
  32. 176
  33. 504
  34. 192
  35. 84
  36. 420
  37. 92
  38. 568
  39. 524
  40. 192

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