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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 747 · 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. 1.55 × 4 =
  2. 2.45 × 8 =
  3. 3.38 × 8 =
  4. 4.60 × 8 =
  5. 5.50 × 8 =
  6. 6.16 × 8 =
  7. 7.75 × 8 =
  8. 8.67 × 4 =
  9. 9.72 × 8 =
  10. 10.71 × 8 =
  11. 11.29 × 8 =
  12. 12.96 × 4 =
  13. 13.50 × 4 =
  14. 14.123 × 4 =
  15. 15.109 × 4 =
  16. 16.24 × 4 =
  17. 17.152 × 4 =
  18. 18.138 × 4 =
  19. 19.75 × 4 =
  20. 20.101 × 4 =
  21. 21.64 × 8 =
  22. 22.159 × 4 =
  23. 23.47 × 4 =
  24. 24.75 × 8 =
  25. 25.12 × 8 =
  26. 26.18 × 8 =
  27. 27.27 × 4 =
  28. 28.37 × 8 =
  29. 29.62 × 8 =
  30. 30.63 × 8 =
  31. 31.37 × 8 =
  32. 32.44 × 8 =
  33. 33.13 × 8 =
  34. 34.48 × 8 =
  35. 35.64 × 8 =
  36. 36.34 × 4 =
  37. 37.15 × 8 =
  38. 38.15 × 4 =
  39. 39.36 × 8 =
  40. 40.57 × 8 =

Answer key

  1. 220
  2. 360
  3. 304
  4. 480
  5. 400
  6. 128
  7. 600
  8. 268
  9. 576
  10. 568
  11. 232
  12. 384
  13. 200
  14. 492
  15. 436
  16. 96
  17. 608
  18. 552
  19. 300
  20. 404
  21. 512
  22. 636
  23. 188
  24. 600
  25. 96
  26. 144
  27. 108
  28. 296
  29. 496
  30. 504
  31. 296
  32. 352
  33. 104
  34. 384
  35. 512
  36. 136
  37. 120
  38. 60
  39. 288
  40. 456

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