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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 816 · 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. 1.30 × 4 =
  2. 2.71 × 8 =
  3. 3.74 × 8 =
  4. 4.55 × 4 =
  5. 5.53 × 8 =
  6. 6.88 × 4 =
  7. 7.45 × 4 =
  8. 8.27 × 4 =
  9. 9.152 × 4 =
  10. 10.61 × 8 =
  11. 11.35 × 8 =
  12. 12.157 × 4 =
  13. 13.70 × 8 =
  14. 14.64 × 8 =
  15. 15.29 × 4 =
  16. 16.13 × 8 =
  17. 17.21 × 8 =
  18. 18.110 × 4 =
  19. 19.156 × 4 =
  20. 20.48 × 4 =
  21. 21.16 × 8 =
  22. 22.41 × 4 =
  23. 23.34 × 4 =
  24. 24.30 × 8 =
  25. 25.21 × 8 =
  26. 26.38 × 8 =
  27. 27.74 × 8 =
  28. 28.52 × 4 =
  29. 29.25 × 8 =
  30. 30.64 × 8 =
  31. 31.66 × 8 =
  32. 32.43 × 8 =
  33. 33.36 × 4 =
  34. 34.34 × 8 =
  35. 35.138 × 4 =
  36. 36.60 × 8 =
  37. 37.32 × 4 =
  38. 38.43 × 8 =
  39. 39.66 × 8 =
  40. 40.54 × 8 =

Answer key

  1. 120
  2. 568
  3. 592
  4. 220
  5. 424
  6. 352
  7. 180
  8. 108
  9. 608
  10. 488
  11. 280
  12. 628
  13. 560
  14. 512
  15. 116
  16. 104
  17. 168
  18. 440
  19. 624
  20. 192
  21. 128
  22. 164
  23. 136
  24. 240
  25. 168
  26. 304
  27. 592
  28. 208
  29. 200
  30. 512
  31. 528
  32. 344
  33. 144
  34. 272
  35. 552
  36. 480
  37. 128
  38. 344
  39. 528
  40. 432

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