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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 745 · 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. 1.50 × 8 =
  2. 2.38 × 8 =
  3. 3.86 × 4 =
  4. 4.49 × 8 =
  5. 5.134 × 4 =
  6. 6.87 × 4 =
  7. 7.17 × 8 =
  8. 8.84 × 4 =
  9. 9.25 × 8 =
  10. 10.133 × 4 =
  11. 11.119 × 4 =
  12. 12.58 × 4 =
  13. 13.17 × 8 =
  14. 14.73 × 8 =
  15. 15.91 × 4 =
  16. 16.63 × 8 =
  17. 17.38 × 4 =
  18. 18.60 × 8 =
  19. 19.37 × 4 =
  20. 20.32 × 4 =
  21. 21.75 × 8 =
  22. 22.36 × 8 =
  23. 23.54 × 8 =
  24. 24.37 × 8 =
  25. 25.72 × 8 =
  26. 26.58 × 4 =
  27. 27.19 × 4 =
  28. 28.21 × 8 =
  29. 29.32 × 8 =
  30. 30.128 × 4 =
  31. 31.48 × 4 =
  32. 32.146 × 4 =
  33. 33.32 × 4 =
  34. 34.29 × 4 =
  35. 35.50 × 4 =
  36. 36.101 × 4 =
  37. 37.27 × 8 =
  38. 38.37 × 4 =
  39. 39.143 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 400
  2. 304
  3. 344
  4. 392
  5. 536
  6. 348
  7. 136
  8. 336
  9. 200
  10. 532
  11. 476
  12. 232
  13. 136
  14. 584
  15. 364
  16. 504
  17. 152
  18. 480
  19. 148
  20. 128
  21. 600
  22. 288
  23. 432
  24. 296
  25. 576
  26. 232
  27. 76
  28. 168
  29. 256
  30. 512
  31. 192
  32. 584
  33. 128
  34. 116
  35. 200
  36. 404
  37. 216
  38. 148
  39. 572
  40. 224

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