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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 233 · 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. 1.73 × 8 =
  2. 2.98 × 4 =
  3. 3.19 × 8 =
  4. 4.31 × 4 =
  5. 5.47 × 8 =
  6. 6.120 × 4 =
  7. 7.54 × 8 =
  8. 8.51 × 8 =
  9. 9.67 × 4 =
  10. 10.72 × 8 =
  11. 11.54 × 4 =
  12. 12.69 × 8 =
  13. 13.75 × 8 =
  14. 14.143 × 4 =
  15. 15.86 × 4 =
  16. 16.120 × 4 =
  17. 17.13 × 8 =
  18. 18.18 × 8 =
  19. 19.119 × 4 =
  20. 20.71 × 8 =
  21. 21.22 × 8 =
  22. 22.141 × 4 =
  23. 23.55 × 4 =
  24. 24.37 × 8 =
  25. 25.54 × 8 =
  26. 26.93 × 4 =
  27. 27.41 × 4 =
  28. 28.68 × 8 =
  29. 29.160 × 4 =
  30. 30.123 × 4 =
  31. 31.22 × 8 =
  32. 32.59 × 8 =
  33. 33.12 × 8 =
  34. 34.71 × 8 =
  35. 35.47 × 8 =
  36. 36.64 × 4 =
  37. 37.18 × 8 =
  38. 38.64 × 8 =
  39. 39.59 × 8 =
  40. 40.39 × 4 =

Answer key

  1. 584
  2. 392
  3. 152
  4. 124
  5. 376
  6. 480
  7. 432
  8. 408
  9. 268
  10. 576
  11. 216
  12. 552
  13. 600
  14. 572
  15. 344
  16. 480
  17. 104
  18. 144
  19. 476
  20. 568
  21. 176
  22. 564
  23. 220
  24. 296
  25. 432
  26. 372
  27. 164
  28. 544
  29. 640
  30. 492
  31. 176
  32. 472
  33. 96
  34. 568
  35. 376
  36. 256
  37. 144
  38. 512
  39. 472
  40. 156

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