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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 346 · 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. 1.34 × 4 =
  2. 2.44 × 8 =
  3. 3.48 × 8 =
  4. 4.46 × 8 =
  5. 5.57 × 8 =
  6. 6.65 × 8 =
  7. 7.71 × 8 =
  8. 8.118 × 4 =
  9. 9.142 × 4 =
  10. 10.26 × 8 =
  11. 11.19 × 8 =
  12. 12.43 × 8 =
  13. 13.32 × 8 =
  14. 14.110 × 4 =
  15. 15.114 × 4 =
  16. 16.28 × 8 =
  17. 17.21 × 8 =
  18. 18.116 × 4 =
  19. 19.19 × 4 =
  20. 20.14 × 8 =
  21. 21.27 × 4 =
  22. 22.146 × 4 =
  23. 23.142 × 4 =
  24. 24.97 × 4 =
  25. 25.28 × 8 =
  26. 26.42 × 4 =
  27. 27.45 × 8 =
  28. 28.56 × 8 =
  29. 29.34 × 4 =
  30. 30.74 × 8 =
  31. 31.19 × 8 =
  32. 32.110 × 4 =
  33. 33.59 × 8 =
  34. 34.28 × 8 =
  35. 35.29 × 4 =
  36. 36.107 × 4 =
  37. 37.116 × 4 =
  38. 38.31 × 4 =
  39. 39.21 × 8 =
  40. 40.81 × 4 =

Answer key

  1. 136
  2. 352
  3. 384
  4. 368
  5. 456
  6. 520
  7. 568
  8. 472
  9. 568
  10. 208
  11. 152
  12. 344
  13. 256
  14. 440
  15. 456
  16. 224
  17. 168
  18. 464
  19. 76
  20. 112
  21. 108
  22. 584
  23. 568
  24. 388
  25. 224
  26. 168
  27. 360
  28. 448
  29. 136
  30. 592
  31. 152
  32. 440
  33. 472
  34. 224
  35. 116
  36. 428
  37. 464
  38. 124
  39. 168
  40. 324

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