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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 641 · 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. 1.20 × 8 =
  2. 2.32 × 8 =
  3. 3.55 × 8 =
  4. 4.120 × 4 =
  5. 5.117 × 4 =
  6. 6.40 × 8 =
  7. 7.31 × 8 =
  8. 8.64 × 8 =
  9. 9.27 × 4 =
  10. 10.87 × 4 =
  11. 11.150 × 4 =
  12. 12.31 × 4 =
  13. 13.70 × 8 =
  14. 14.32 × 8 =
  15. 15.25 × 8 =
  16. 16.81 × 4 =
  17. 17.43 × 8 =
  18. 18.114 × 4 =
  19. 19.40 × 8 =
  20. 20.56 × 8 =
  21. 21.13 × 4 =
  22. 22.36 × 8 =
  23. 23.55 × 4 =
  24. 24.119 × 4 =
  25. 25.61 × 8 =
  26. 26.57 × 8 =
  27. 27.71 × 4 =
  28. 28.125 × 4 =
  29. 29.85 × 4 =
  30. 30.44 × 8 =
  31. 31.99 × 4 =
  32. 32.34 × 8 =
  33. 33.99 × 4 =
  34. 34.132 × 4 =
  35. 35.69 × 8 =
  36. 36.50 × 4 =
  37. 37.17 × 4 =
  38. 38.22 × 4 =
  39. 39.26 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 160
  2. 256
  3. 440
  4. 480
  5. 468
  6. 320
  7. 248
  8. 512
  9. 108
  10. 348
  11. 600
  12. 124
  13. 560
  14. 256
  15. 200
  16. 324
  17. 344
  18. 456
  19. 320
  20. 448
  21. 52
  22. 288
  23. 220
  24. 476
  25. 488
  26. 456
  27. 284
  28. 500
  29. 340
  30. 352
  31. 396
  32. 272
  33. 396
  34. 528
  35. 552
  36. 200
  37. 68
  38. 88
  39. 208
  40. 88

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