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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 563 · 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. 1.54 × 8 =
  2. 2.20 × 4 =
  3. 3.127 × 4 =
  4. 4.32 × 8 =
  5. 5.113 × 4 =
  6. 6.45 × 4 =
  7. 7.75 × 8 =
  8. 8.59 × 8 =
  9. 9.74 × 8 =
  10. 10.14 × 8 =
  11. 11.44 × 8 =
  12. 12.141 × 4 =
  13. 13.54 × 4 =
  14. 14.69 × 4 =
  15. 15.64 × 8 =
  16. 16.24 × 8 =
  17. 17.20 × 8 =
  18. 18.30 × 4 =
  19. 19.69 × 4 =
  20. 20.102 × 4 =
  21. 21.18 × 4 =
  22. 22.74 × 8 =
  23. 23.68 × 8 =
  24. 24.84 × 4 =
  25. 25.18 × 4 =
  26. 26.26 × 8 =
  27. 27.49 × 8 =
  28. 28.70 × 4 =
  29. 29.51 × 4 =
  30. 30.87 × 4 =
  31. 31.61 × 8 =
  32. 32.28 × 4 =
  33. 33.35 × 8 =
  34. 34.92 × 4 =
  35. 35.141 × 4 =
  36. 36.30 × 8 =
  37. 37.22 × 4 =
  38. 38.132 × 4 =
  39. 39.124 × 4 =
  40. 40.74 × 8 =

Answer key

  1. 432
  2. 80
  3. 508
  4. 256
  5. 452
  6. 180
  7. 600
  8. 472
  9. 592
  10. 112
  11. 352
  12. 564
  13. 216
  14. 276
  15. 512
  16. 192
  17. 160
  18. 120
  19. 276
  20. 408
  21. 72
  22. 592
  23. 544
  24. 336
  25. 72
  26. 208
  27. 392
  28. 280
  29. 204
  30. 348
  31. 488
  32. 112
  33. 280
  34. 368
  35. 564
  36. 240
  37. 88
  38. 528
  39. 496
  40. 592

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