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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 292 · 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. 1.68 × 8 =
  2. 2.101 × 4 =
  3. 3.58 × 8 =
  4. 4.27 × 8 =
  5. 5.68 × 8 =
  6. 6.30 × 8 =
  7. 7.158 × 4 =
  8. 8.156 × 4 =
  9. 9.13 × 8 =
  10. 10.19 × 4 =
  11. 11.52 × 8 =
  12. 12.60 × 4 =
  13. 13.23 × 8 =
  14. 14.45 × 8 =
  15. 15.36 × 8 =
  16. 16.33 × 4 =
  17. 17.95 × 4 =
  18. 18.26 × 4 =
  19. 19.34 × 8 =
  20. 20.64 × 8 =
  21. 21.119 × 4 =
  22. 22.23 × 8 =
  23. 23.72 × 4 =
  24. 24.17 × 8 =
  25. 25.43 × 8 =
  26. 26.131 × 4 =
  27. 27.68 × 8 =
  28. 28.55 × 4 =
  29. 29.72 × 8 =
  30. 30.26 × 8 =
  31. 31.101 × 4 =
  32. 32.19 × 8 =
  33. 33.15 × 4 =
  34. 34.58 × 8 =
  35. 35.67 × 8 =
  36. 36.71 × 8 =
  37. 37.27 × 4 =
  38. 38.60 × 8 =
  39. 39.29 × 4 =
  40. 40.43 × 8 =

Answer key

  1. 544
  2. 404
  3. 464
  4. 216
  5. 544
  6. 240
  7. 632
  8. 624
  9. 104
  10. 76
  11. 416
  12. 240
  13. 184
  14. 360
  15. 288
  16. 132
  17. 380
  18. 104
  19. 272
  20. 512
  21. 476
  22. 184
  23. 288
  24. 136
  25. 344
  26. 524
  27. 544
  28. 220
  29. 576
  30. 208
  31. 404
  32. 152
  33. 60
  34. 464
  35. 536
  36. 568
  37. 108
  38. 480
  39. 116
  40. 344

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