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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 570 · 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. 1.39 × 8 =
  2. 2.57 × 8 =
  3. 3.36 × 8 =
  4. 4.117 × 4 =
  5. 5.46 × 8 =
  6. 6.42 × 8 =
  7. 7.87 × 4 =
  8. 8.49 × 8 =
  9. 9.26 × 8 =
  10. 10.31 × 8 =
  11. 11.40 × 4 =
  12. 12.32 × 4 =
  13. 13.54 × 4 =
  14. 14.39 × 4 =
  15. 15.95 × 4 =
  16. 16.16 × 4 =
  17. 17.46 × 8 =
  18. 18.54 × 8 =
  19. 19.41 × 4 =
  20. 20.74 × 8 =
  21. 21.39 × 8 =
  22. 22.12 × 8 =
  23. 23.96 × 4 =
  24. 24.33 × 8 =
  25. 25.51 × 4 =
  26. 26.72 × 4 =
  27. 27.38 × 4 =
  28. 28.15 × 4 =
  29. 29.13 × 4 =
  30. 30.60 × 8 =
  31. 31.64 × 8 =
  32. 32.48 × 4 =
  33. 33.124 × 4 =
  34. 34.118 × 4 =
  35. 35.53 × 4 =
  36. 36.28 × 8 =
  37. 37.46 × 4 =
  38. 38.16 × 8 =
  39. 39.88 × 4 =
  40. 40.89 × 4 =

Answer key

  1. 312
  2. 456
  3. 288
  4. 468
  5. 368
  6. 336
  7. 348
  8. 392
  9. 208
  10. 248
  11. 160
  12. 128
  13. 216
  14. 156
  15. 380
  16. 64
  17. 368
  18. 432
  19. 164
  20. 592
  21. 312
  22. 96
  23. 384
  24. 264
  25. 204
  26. 288
  27. 152
  28. 60
  29. 52
  30. 480
  31. 512
  32. 192
  33. 496
  34. 472
  35. 212
  36. 224
  37. 184
  38. 128
  39. 352
  40. 356

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