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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 488 · 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. 1.13 × 4 =
  2. 2.67 × 8 =
  3. 3.12 × 8 =
  4. 4.47 × 4 =
  5. 5.42 × 8 =
  6. 6.16 × 8 =
  7. 7.18 × 8 =
  8. 8.102 × 4 =
  9. 9.28 × 8 =
  10. 10.51 × 4 =
  11. 11.19 × 8 =
  12. 12.66 × 8 =
  13. 13.22 × 8 =
  14. 14.34 × 4 =
  15. 15.59 × 4 =
  16. 16.90 × 4 =
  17. 17.87 × 4 =
  18. 18.49 × 4 =
  19. 19.18 × 8 =
  20. 20.46 × 4 =
  21. 21.60 × 8 =
  22. 22.156 × 4 =
  23. 23.48 × 4 =
  24. 24.19 × 8 =
  25. 25.118 × 4 =
  26. 26.52 × 4 =
  27. 27.61 × 8 =
  28. 28.134 × 4 =
  29. 29.139 × 4 =
  30. 30.15 × 8 =
  31. 31.83 × 4 =
  32. 32.64 × 8 =
  33. 33.121 × 4 =
  34. 34.147 × 4 =
  35. 35.14 × 8 =
  36. 36.29 × 8 =
  37. 37.30 × 8 =
  38. 38.16 × 8 =
  39. 39.12 × 8 =
  40. 40.120 × 4 =

Answer key

  1. 52
  2. 536
  3. 96
  4. 188
  5. 336
  6. 128
  7. 144
  8. 408
  9. 224
  10. 204
  11. 152
  12. 528
  13. 176
  14. 136
  15. 236
  16. 360
  17. 348
  18. 196
  19. 144
  20. 184
  21. 480
  22. 624
  23. 192
  24. 152
  25. 472
  26. 208
  27. 488
  28. 536
  29. 556
  30. 120
  31. 332
  32. 512
  33. 484
  34. 588
  35. 112
  36. 232
  37. 240
  38. 128
  39. 96
  40. 480

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