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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 84 · 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. 1.19 × 4 =
  2. 2.24 × 8 =
  3. 3.47 × 4 =
  4. 4.34 × 8 =
  5. 5.105 × 4 =
  6. 6.44 × 8 =
  7. 7.36 × 8 =
  8. 8.21 × 4 =
  9. 9.33 × 8 =
  10. 10.51 × 4 =
  11. 11.49 × 8 =
  12. 12.52 × 4 =
  13. 13.64 × 8 =
  14. 14.72 × 8 =
  15. 15.21 × 4 =
  16. 16.47 × 4 =
  17. 17.15 × 8 =
  18. 18.156 × 4 =
  19. 19.20 × 8 =
  20. 20.20 × 4 =
  21. 21.48 × 8 =
  22. 22.60 × 8 =
  23. 23.30 × 8 =
  24. 24.73 × 8 =
  25. 25.30 × 8 =
  26. 26.154 × 4 =
  27. 27.52 × 8 =
  28. 28.130 × 4 =
  29. 29.62 × 4 =
  30. 30.135 × 4 =
  31. 31.23 × 8 =
  32. 32.59 × 4 =
  33. 33.46 × 4 =
  34. 34.46 × 8 =
  35. 35.118 × 4 =
  36. 36.39 × 8 =
  37. 37.39 × 8 =
  38. 38.33 × 8 =
  39. 39.138 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 76
  2. 192
  3. 188
  4. 272
  5. 420
  6. 352
  7. 288
  8. 84
  9. 264
  10. 204
  11. 392
  12. 208
  13. 512
  14. 576
  15. 84
  16. 188
  17. 120
  18. 624
  19. 160
  20. 80
  21. 384
  22. 480
  23. 240
  24. 584
  25. 240
  26. 616
  27. 416
  28. 520
  29. 248
  30. 540
  31. 184
  32. 236
  33. 184
  34. 368
  35. 472
  36. 312
  37. 312
  38. 264
  39. 552
  40. 360

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