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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 319 · 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. 1.18 × 8 =
  2. 2.43 × 8 =
  3. 3.65 × 4 =
  4. 4.13 × 8 =
  5. 5.118 × 4 =
  6. 6.31 × 8 =
  7. 7.31 × 4 =
  8. 8.20 × 4 =
  9. 9.62 × 4 =
  10. 10.73 × 8 =
  11. 11.72 × 8 =
  12. 12.33 × 4 =
  13. 13.54 × 8 =
  14. 14.25 × 4 =
  15. 15.44 × 8 =
  16. 16.16 × 8 =
  17. 17.127 × 4 =
  18. 18.98 × 4 =
  19. 19.54 × 8 =
  20. 20.33 × 8 =
  21. 21.41 × 4 =
  22. 22.96 × 4 =
  23. 23.33 × 4 =
  24. 24.157 × 4 =
  25. 25.16 × 8 =
  26. 26.84 × 4 =
  27. 27.43 × 8 =
  28. 28.66 × 8 =
  29. 29.148 × 4 =
  30. 30.30 × 8 =
  31. 31.50 × 4 =
  32. 32.156 × 4 =
  33. 33.93 × 4 =
  34. 34.13 × 8 =
  35. 35.149 × 4 =
  36. 36.27 × 8 =
  37. 37.41 × 8 =
  38. 38.69 × 4 =
  39. 39.84 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 144
  2. 344
  3. 260
  4. 104
  5. 472
  6. 248
  7. 124
  8. 80
  9. 248
  10. 584
  11. 576
  12. 132
  13. 432
  14. 100
  15. 352
  16. 128
  17. 508
  18. 392
  19. 432
  20. 264
  21. 164
  22. 384
  23. 132
  24. 628
  25. 128
  26. 336
  27. 344
  28. 528
  29. 592
  30. 240
  31. 200
  32. 624
  33. 372
  34. 104
  35. 596
  36. 216
  37. 328
  38. 276
  39. 336
  40. 116

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