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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 714 · 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. 1.137 × 4 =
  2. 2.28 × 4 =
  3. 3.71 × 8 =
  4. 4.47 × 8 =
  5. 5.51 × 8 =
  6. 6.106 × 4 =
  7. 7.51 × 4 =
  8. 8.56 × 4 =
  9. 9.19 × 4 =
  10. 10.69 × 4 =
  11. 11.66 × 8 =
  12. 12.159 × 4 =
  13. 13.68 × 8 =
  14. 14.150 × 4 =
  15. 15.67 × 8 =
  16. 16.72 × 8 =
  17. 17.14 × 8 =
  18. 18.21 × 8 =
  19. 19.73 × 8 =
  20. 20.22 × 4 =
  21. 21.131 × 4 =
  22. 22.25 × 8 =
  23. 23.26 × 8 =
  24. 24.60 × 8 =
  25. 25.17 × 8 =
  26. 26.48 × 8 =
  27. 27.104 × 4 =
  28. 28.47 × 8 =
  29. 29.12 × 8 =
  30. 30.15 × 8 =
  31. 31.62 × 4 =
  32. 32.19 × 8 =
  33. 33.18 × 8 =
  34. 34.47 × 8 =
  35. 35.17 × 8 =
  36. 36.21 × 8 =
  37. 37.62 × 8 =
  38. 38.54 × 8 =
  39. 39.53 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 548
  2. 112
  3. 568
  4. 376
  5. 408
  6. 424
  7. 204
  8. 224
  9. 76
  10. 276
  11. 528
  12. 636
  13. 544
  14. 600
  15. 536
  16. 576
  17. 112
  18. 168
  19. 584
  20. 88
  21. 524
  22. 200
  23. 208
  24. 480
  25. 136
  26. 384
  27. 416
  28. 376
  29. 96
  30. 120
  31. 248
  32. 152
  33. 144
  34. 376
  35. 136
  36. 168
  37. 496
  38. 432
  39. 424
  40. 96

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