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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 336 · 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. 1.29 × 4 =
  2. 2.34 × 8 =
  3. 3.67 × 8 =
  4. 4.47 × 8 =
  5. 5.25 × 8 =
  6. 6.126 × 4 =
  7. 7.12 × 8 =
  8. 8.45 × 8 =
  9. 9.16 × 8 =
  10. 10.27 × 8 =
  11. 11.34 × 8 =
  12. 12.79 × 4 =
  13. 13.32 × 4 =
  14. 14.121 × 4 =
  15. 15.103 × 4 =
  16. 16.33 × 8 =
  17. 17.25 × 4 =
  18. 18.73 × 8 =
  19. 19.43 × 4 =
  20. 20.40 × 8 =
  21. 21.140 × 4 =
  22. 22.20 × 8 =
  23. 23.66 × 8 =
  24. 24.103 × 4 =
  25. 25.26 × 4 =
  26. 26.51 × 8 =
  27. 27.66 × 8 =
  28. 28.40 × 8 =
  29. 29.42 × 8 =
  30. 30.22 × 4 =
  31. 31.60 × 8 =
  32. 32.60 × 4 =
  33. 33.140 × 4 =
  34. 34.13 × 8 =
  35. 35.67 × 8 =
  36. 36.44 × 8 =
  37. 37.74 × 4 =
  38. 38.142 × 4 =
  39. 39.28 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 116
  2. 272
  3. 536
  4. 376
  5. 200
  6. 504
  7. 96
  8. 360
  9. 128
  10. 216
  11. 272
  12. 316
  13. 128
  14. 484
  15. 412
  16. 264
  17. 100
  18. 584
  19. 172
  20. 320
  21. 560
  22. 160
  23. 528
  24. 412
  25. 104
  26. 408
  27. 528
  28. 320
  29. 336
  30. 88
  31. 480
  32. 240
  33. 560
  34. 104
  35. 536
  36. 352
  37. 296
  38. 568
  39. 224
  40. 68

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