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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 590 · 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. 1.107 × 4 =
  2. 2.53 × 8 =
  3. 3.72 × 8 =
  4. 4.64 × 8 =
  5. 5.69 × 8 =
  6. 6.47 × 8 =
  7. 7.143 × 4 =
  8. 8.21 × 4 =
  9. 9.32 × 4 =
  10. 10.39 × 4 =
  11. 11.24 × 4 =
  12. 12.136 × 4 =
  13. 13.88 × 4 =
  14. 14.22 × 4 =
  15. 15.23 × 8 =
  16. 16.45 × 4 =
  17. 17.120 × 4 =
  18. 18.71 × 8 =
  19. 19.62 × 8 =
  20. 20.77 × 4 =
  21. 21.16 × 4 =
  22. 22.93 × 4 =
  23. 23.61 × 8 =
  24. 24.48 × 8 =
  25. 25.31 × 8 =
  26. 26.134 × 4 =
  27. 27.66 × 4 =
  28. 28.104 × 4 =
  29. 29.54 × 8 =
  30. 30.20 × 4 =
  31. 31.152 × 4 =
  32. 32.32 × 8 =
  33. 33.111 × 4 =
  34. 34.55 × 4 =
  35. 35.124 × 4 =
  36. 36.143 × 4 =
  37. 37.40 × 8 =
  38. 38.77 × 4 =
  39. 39.14 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 428
  2. 424
  3. 576
  4. 512
  5. 552
  6. 376
  7. 572
  8. 84
  9. 128
  10. 156
  11. 96
  12. 544
  13. 352
  14. 88
  15. 184
  16. 180
  17. 480
  18. 568
  19. 496
  20. 308
  21. 64
  22. 372
  23. 488
  24. 384
  25. 248
  26. 536
  27. 264
  28. 416
  29. 432
  30. 80
  31. 608
  32. 256
  33. 444
  34. 220
  35. 496
  36. 572
  37. 320
  38. 308
  39. 112
  40. 312

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