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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 330 · 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. 1.158 × 4 =
  2. 2.70 × 4 =
  3. 3.75 × 4 =
  4. 4.45 × 8 =
  5. 5.73 × 4 =
  6. 6.109 × 4 =
  7. 7.48 × 4 =
  8. 8.71 × 8 =
  9. 9.22 × 8 =
  10. 10.60 × 8 =
  11. 11.131 × 4 =
  12. 12.69 × 8 =
  13. 13.86 × 4 =
  14. 14.58 × 8 =
  15. 15.31 × 8 =
  16. 16.33 × 4 =
  17. 17.148 × 4 =
  18. 18.45 × 8 =
  19. 19.26 × 4 =
  20. 20.19 × 8 =
  21. 21.14 × 8 =
  22. 22.24 × 4 =
  23. 23.147 × 4 =
  24. 24.69 × 8 =
  25. 25.40 × 8 =
  26. 26.46 × 4 =
  27. 27.36 × 8 =
  28. 28.136 × 4 =
  29. 29.14 × 4 =
  30. 30.47 × 4 =
  31. 31.46 × 8 =
  32. 32.59 × 8 =
  33. 33.33 × 8 =
  34. 34.17 × 4 =
  35. 35.32 × 4 =
  36. 36.15 × 8 =
  37. 37.29 × 8 =
  38. 38.12 × 8 =
  39. 39.139 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 632
  2. 280
  3. 300
  4. 360
  5. 292
  6. 436
  7. 192
  8. 568
  9. 176
  10. 480
  11. 524
  12. 552
  13. 344
  14. 464
  15. 248
  16. 132
  17. 592
  18. 360
  19. 104
  20. 152
  21. 112
  22. 96
  23. 588
  24. 552
  25. 320
  26. 184
  27. 288
  28. 544
  29. 56
  30. 188
  31. 368
  32. 472
  33. 264
  34. 68
  35. 128
  36. 120
  37. 232
  38. 96
  39. 556
  40. 248

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