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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 52 · 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. 1.75 × 8 =
  2. 2.83 × 4 =
  3. 3.28 × 8 =
  4. 4.32 × 8 =
  5. 5.38 × 8 =
  6. 6.160 × 4 =
  7. 7.21 × 8 =
  8. 8.72 × 8 =
  9. 9.60 × 4 =
  10. 10.155 × 4 =
  11. 11.52 × 8 =
  12. 12.53 × 8 =
  13. 13.42 × 4 =
  14. 14.110 × 4 =
  15. 15.118 × 4 =
  16. 16.142 × 4 =
  17. 17.53 × 8 =
  18. 18.73 × 8 =
  19. 19.101 × 4 =
  20. 20.24 × 8 =
  21. 21.121 × 4 =
  22. 22.118 × 4 =
  23. 23.80 × 4 =
  24. 24.108 × 4 =
  25. 25.31 × 8 =
  26. 26.154 × 4 =
  27. 27.147 × 4 =
  28. 28.75 × 8 =
  29. 29.88 × 4 =
  30. 30.17 × 8 =
  31. 31.61 × 4 =
  32. 32.160 × 4 =
  33. 33.24 × 4 =
  34. 34.141 × 4 =
  35. 35.74 × 4 =
  36. 36.126 × 4 =
  37. 37.69 × 8 =
  38. 38.25 × 8 =
  39. 39.45 × 8 =
  40. 40.90 × 4 =

Answer key

  1. 600
  2. 332
  3. 224
  4. 256
  5. 304
  6. 640
  7. 168
  8. 576
  9. 240
  10. 620
  11. 416
  12. 424
  13. 168
  14. 440
  15. 472
  16. 568
  17. 424
  18. 584
  19. 404
  20. 192
  21. 484
  22. 472
  23. 320
  24. 432
  25. 248
  26. 616
  27. 588
  28. 600
  29. 352
  30. 136
  31. 244
  32. 640
  33. 96
  34. 564
  35. 296
  36. 504
  37. 552
  38. 200
  39. 360
  40. 360

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