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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 32 · 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. 1.106 × 4 =
  2. 2.82 × 4 =
  3. 3.60 × 8 =
  4. 4.133 × 4 =
  5. 5.19 × 8 =
  6. 6.39 × 8 =
  7. 7.61 × 4 =
  8. 8.73 × 4 =
  9. 9.44 × 4 =
  10. 10.57 × 4 =
  11. 11.72 × 4 =
  12. 12.51 × 4 =
  13. 13.59 × 8 =
  14. 14.104 × 4 =
  15. 15.67 × 8 =
  16. 16.39 × 8 =
  17. 17.119 × 4 =
  18. 18.145 × 4 =
  19. 19.24 × 4 =
  20. 20.147 × 4 =
  21. 21.39 × 8 =
  22. 22.145 × 4 =
  23. 23.41 × 4 =
  24. 24.40 × 8 =
  25. 25.22 × 4 =
  26. 26.24 × 8 =
  27. 27.66 × 4 =
  28. 28.64 × 8 =
  29. 29.52 × 8 =
  30. 30.120 × 4 =
  31. 31.22 × 8 =
  32. 32.91 × 4 =
  33. 33.88 × 4 =
  34. 34.34 × 8 =
  35. 35.68 × 8 =
  36. 36.130 × 4 =
  37. 37.54 × 4 =
  38. 38.121 × 4 =
  39. 39.89 × 4 =
  40. 40.142 × 4 =

Answer key

  1. 424
  2. 328
  3. 480
  4. 532
  5. 152
  6. 312
  7. 244
  8. 292
  9. 176
  10. 228
  11. 288
  12. 204
  13. 472
  14. 416
  15. 536
  16. 312
  17. 476
  18. 580
  19. 96
  20. 588
  21. 312
  22. 580
  23. 164
  24. 320
  25. 88
  26. 192
  27. 264
  28. 512
  29. 416
  30. 480
  31. 176
  32. 364
  33. 352
  34. 272
  35. 544
  36. 520
  37. 216
  38. 484
  39. 356
  40. 568

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