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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 608 · 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. 1.67 × 4 =
  2. 2.53 × 8 =
  3. 3.71 × 8 =
  4. 4.30 × 8 =
  5. 5.29 × 8 =
  6. 6.49 × 4 =
  7. 7.20 × 8 =
  8. 8.156 × 4 =
  9. 9.66 × 8 =
  10. 10.20 × 8 =
  11. 11.97 × 4 =
  12. 12.13 × 8 =
  13. 13.13 × 8 =
  14. 14.24 × 8 =
  15. 15.62 × 8 =
  16. 16.153 × 4 =
  17. 17.25 × 8 =
  18. 18.77 × 4 =
  19. 19.67 × 4 =
  20. 20.53 × 4 =
  21. 21.60 × 8 =
  22. 22.94 × 4 =
  23. 23.47 × 4 =
  24. 24.93 × 4 =
  25. 25.108 × 4 =
  26. 26.55 × 4 =
  27. 27.72 × 8 =
  28. 28.48 × 4 =
  29. 29.12 × 8 =
  30. 30.76 × 4 =
  31. 31.74 × 8 =
  32. 32.33 × 8 =
  33. 33.26 × 8 =
  34. 34.44 × 4 =
  35. 35.20 × 8 =
  36. 36.75 × 4 =
  37. 37.44 × 8 =
  38. 38.64 × 8 =
  39. 39.67 × 8 =
  40. 40.86 × 4 =

Answer key

  1. 268
  2. 424
  3. 568
  4. 240
  5. 232
  6. 196
  7. 160
  8. 624
  9. 528
  10. 160
  11. 388
  12. 104
  13. 104
  14. 192
  15. 496
  16. 612
  17. 200
  18. 308
  19. 268
  20. 212
  21. 480
  22. 376
  23. 188
  24. 372
  25. 432
  26. 220
  27. 576
  28. 192
  29. 96
  30. 304
  31. 592
  32. 264
  33. 208
  34. 176
  35. 160
  36. 300
  37. 352
  38. 512
  39. 536
  40. 344

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