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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 468 · 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. 2.152 × 4 =
  3. 3.63 × 8 =
  4. 4.25 × 8 =
  5. 5.100 × 4 =
  6. 6.64 × 8 =
  7. 7.29 × 8 =
  8. 8.21 × 8 =
  9. 9.110 × 4 =
  10. 10.73 × 8 =
  11. 11.31 × 4 =
  12. 12.12 × 8 =
  13. 13.94 × 4 =
  14. 14.60 × 8 =
  15. 15.25 × 8 =
  16. 16.140 × 4 =
  17. 17.40 × 4 =
  18. 18.13 × 8 =
  19. 19.25 × 8 =
  20. 20.35 × 8 =
  21. 21.124 × 4 =
  22. 22.66 × 4 =
  23. 23.103 × 4 =
  24. 24.30 × 8 =
  25. 25.94 × 4 =
  26. 26.22 × 8 =
  27. 27.18 × 8 =
  28. 28.24 × 8 =
  29. 29.55 × 8 =
  30. 30.108 × 4 =
  31. 31.64 × 8 =
  32. 32.18 × 8 =
  33. 33.52 × 8 =
  34. 34.23 × 4 =
  35. 35.96 × 4 =
  36. 36.89 × 4 =
  37. 37.12 × 8 =
  38. 38.77 × 4 =
  39. 39.40 × 8 =
  40. 40.40 × 4 =

Answer key

  1. 144
  2. 608
  3. 504
  4. 200
  5. 400
  6. 512
  7. 232
  8. 168
  9. 440
  10. 584
  11. 124
  12. 96
  13. 376
  14. 480
  15. 200
  16. 560
  17. 160
  18. 104
  19. 200
  20. 280
  21. 496
  22. 264
  23. 412
  24. 240
  25. 376
  26. 176
  27. 144
  28. 192
  29. 440
  30. 432
  31. 512
  32. 144
  33. 416
  34. 92
  35. 384
  36. 356
  37. 96
  38. 308
  39. 320
  40. 160

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