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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 519 · 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. 1.108 × 4 =
  2. 2.48 × 4 =
  3. 3.17 × 8 =
  4. 4.112 × 4 =
  5. 5.72 × 8 =
  6. 6.51 × 8 =
  7. 7.25 × 8 =
  8. 8.14 × 4 =
  9. 9.14 × 8 =
  10. 10.29 × 8 =
  11. 11.20 × 8 =
  12. 12.13 × 8 =
  13. 13.35 × 8 =
  14. 14.60 × 8 =
  15. 15.55 × 4 =
  16. 16.69 × 4 =
  17. 17.64 × 8 =
  18. 18.37 × 8 =
  19. 19.27 × 8 =
  20. 20.60 × 4 =
  21. 21.147 × 4 =
  22. 22.117 × 4 =
  23. 23.143 × 4 =
  24. 24.151 × 4 =
  25. 25.27 × 8 =
  26. 26.143 × 4 =
  27. 27.32 × 4 =
  28. 28.45 × 8 =
  29. 29.114 × 4 =
  30. 30.31 × 8 =
  31. 31.102 × 4 =
  32. 32.61 × 8 =
  33. 33.115 × 4 =
  34. 34.49 × 4 =
  35. 35.15 × 4 =
  36. 36.135 × 4 =
  37. 37.30 × 8 =
  38. 38.53 × 8 =
  39. 39.58 × 8 =
  40. 40.50 × 4 =

Answer key

  1. 432
  2. 192
  3. 136
  4. 448
  5. 576
  6. 408
  7. 200
  8. 56
  9. 112
  10. 232
  11. 160
  12. 104
  13. 280
  14. 480
  15. 220
  16. 276
  17. 512
  18. 296
  19. 216
  20. 240
  21. 588
  22. 468
  23. 572
  24. 604
  25. 216
  26. 572
  27. 128
  28. 360
  29. 456
  30. 248
  31. 408
  32. 488
  33. 460
  34. 196
  35. 60
  36. 540
  37. 240
  38. 424
  39. 464
  40. 200

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