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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 175 · 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. 1.35 × 8 =
  2. 2.41 × 8 =
  3. 3.20 × 8 =
  4. 4.67 × 8 =
  5. 5.103 × 4 =
  6. 6.21 × 4 =
  7. 7.65 × 8 =
  8. 8.25 × 4 =
  9. 9.91 × 4 =
  10. 10.74 × 8 =
  11. 11.75 × 8 =
  12. 12.61 × 8 =
  13. 13.54 × 4 =
  14. 14.32 × 4 =
  15. 15.67 × 8 =
  16. 16.26 × 8 =
  17. 17.126 × 4 =
  18. 18.31 × 8 =
  19. 19.150 × 4 =
  20. 20.35 × 8 =
  21. 21.52 × 8 =
  22. 22.74 × 8 =
  23. 23.140 × 4 =
  24. 24.27 × 8 =
  25. 25.89 × 4 =
  26. 26.19 × 8 =
  27. 27.61 × 8 =
  28. 28.159 × 4 =
  29. 29.24 × 4 =
  30. 30.127 × 4 =
  31. 31.14 × 8 =
  32. 32.54 × 8 =
  33. 33.63 × 8 =
  34. 34.60 × 8 =
  35. 35.13 × 8 =
  36. 36.60 × 4 =
  37. 37.118 × 4 =
  38. 38.53 × 4 =
  39. 39.75 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 280
  2. 328
  3. 160
  4. 536
  5. 412
  6. 84
  7. 520
  8. 100
  9. 364
  10. 592
  11. 600
  12. 488
  13. 216
  14. 128
  15. 536
  16. 208
  17. 504
  18. 248
  19. 600
  20. 280
  21. 416
  22. 592
  23. 560
  24. 216
  25. 356
  26. 152
  27. 488
  28. 636
  29. 96
  30. 508
  31. 112
  32. 432
  33. 504
  34. 480
  35. 104
  36. 240
  37. 472
  38. 212
  39. 300
  40. 112

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