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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 287 · 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. 1.28 × 8 =
  2. 2.28 × 4 =
  3. 3.113 × 4 =
  4. 4.52 × 8 =
  5. 5.107 × 4 =
  6. 6.66 × 4 =
  7. 7.20 × 8 =
  8. 8.74 × 8 =
  9. 9.73 × 4 =
  10. 10.50 × 8 =
  11. 11.54 × 4 =
  12. 12.88 × 4 =
  13. 13.64 × 8 =
  14. 14.37 × 8 =
  15. 15.33 × 4 =
  16. 16.98 × 4 =
  17. 17.33 × 8 =
  18. 18.61 × 8 =
  19. 19.41 × 8 =
  20. 20.64 × 8 =
  21. 21.52 × 4 =
  22. 22.29 × 8 =
  23. 23.74 × 4 =
  24. 24.26 × 8 =
  25. 25.44 × 4 =
  26. 26.23 × 4 =
  27. 27.48 × 4 =
  28. 28.50 × 8 =
  29. 29.25 × 8 =
  30. 30.102 × 4 =
  31. 31.53 × 4 =
  32. 32.110 × 4 =
  33. 33.89 × 4 =
  34. 34.15 × 8 =
  35. 35.22 × 8 =
  36. 36.127 × 4 =
  37. 37.99 × 4 =
  38. 38.86 × 4 =
  39. 39.27 × 8 =
  40. 40.108 × 4 =

Answer key

  1. 224
  2. 112
  3. 452
  4. 416
  5. 428
  6. 264
  7. 160
  8. 592
  9. 292
  10. 400
  11. 216
  12. 352
  13. 512
  14. 296
  15. 132
  16. 392
  17. 264
  18. 488
  19. 328
  20. 512
  21. 208
  22. 232
  23. 296
  24. 208
  25. 176
  26. 92
  27. 192
  28. 400
  29. 200
  30. 408
  31. 212
  32. 440
  33. 356
  34. 120
  35. 176
  36. 508
  37. 396
  38. 344
  39. 216
  40. 432

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