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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 869 · 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. 1.28 × 8 =
  2. 2.140 × 4 =
  3. 3.44 × 8 =
  4. 4.45 × 8 =
  5. 5.59 × 8 =
  6. 6.69 × 8 =
  7. 7.158 × 4 =
  8. 8.36 × 8 =
  9. 9.38 × 8 =
  10. 10.40 × 8 =
  11. 11.57 × 8 =
  12. 12.74 × 4 =
  13. 13.64 × 8 =
  14. 14.99 × 4 =
  15. 15.14 × 8 =
  16. 16.27 × 8 =
  17. 17.147 × 4 =
  18. 18.74 × 8 =
  19. 19.54 × 4 =
  20. 20.43 × 8 =
  21. 21.27 × 4 =
  22. 22.38 × 8 =
  23. 23.32 × 8 =
  24. 24.143 × 4 =
  25. 25.34 × 4 =
  26. 26.68 × 8 =
  27. 27.23 × 4 =
  28. 28.52 × 8 =
  29. 29.157 × 4 =
  30. 30.71 × 8 =
  31. 31.62 × 8 =
  32. 32.13 × 8 =
  33. 33.62 × 8 =
  34. 34.126 × 4 =
  35. 35.32 × 8 =
  36. 36.18 × 4 =
  37. 37.109 × 4 =
  38. 38.142 × 4 =
  39. 39.33 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 224
  2. 560
  3. 352
  4. 360
  5. 472
  6. 552
  7. 632
  8. 288
  9. 304
  10. 320
  11. 456
  12. 296
  13. 512
  14. 396
  15. 112
  16. 216
  17. 588
  18. 592
  19. 216
  20. 344
  21. 108
  22. 304
  23. 256
  24. 572
  25. 136
  26. 544
  27. 92
  28. 416
  29. 628
  30. 568
  31. 496
  32. 104
  33. 496
  34. 504
  35. 256
  36. 72
  37. 436
  38. 568
  39. 264
  40. 56

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