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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 67 · 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. 1.14 × 8 =
  2. 2.18 × 8 =
  3. 3.69 × 4 =
  4. 4.72 × 4 =
  5. 5.72 × 8 =
  6. 6.46 × 4 =
  7. 7.59 × 4 =
  8. 8.130 × 4 =
  9. 9.60 × 8 =
  10. 10.36 × 4 =
  11. 11.80 × 4 =
  12. 12.30 × 8 =
  13. 13.66 × 4 =
  14. 14.22 × 4 =
  15. 15.75 × 8 =
  16. 16.107 × 4 =
  17. 17.117 × 4 =
  18. 18.28 × 4 =
  19. 19.16 × 4 =
  20. 20.75 × 4 =
  21. 21.117 × 4 =
  22. 22.27 × 8 =
  23. 23.33 × 8 =
  24. 24.15 × 8 =
  25. 25.62 × 8 =
  26. 26.24 × 8 =
  27. 27.74 × 8 =
  28. 28.94 × 4 =
  29. 29.122 × 4 =
  30. 30.66 × 8 =
  31. 31.39 × 8 =
  32. 32.150 × 4 =
  33. 33.26 × 4 =
  34. 34.61 × 8 =
  35. 35.80 × 4 =
  36. 36.142 × 4 =
  37. 37.116 × 4 =
  38. 38.40 × 4 =
  39. 39.76 × 4 =
  40. 40.97 × 4 =

Answer key

  1. 112
  2. 144
  3. 276
  4. 288
  5. 576
  6. 184
  7. 236
  8. 520
  9. 480
  10. 144
  11. 320
  12. 240
  13. 264
  14. 88
  15. 600
  16. 428
  17. 468
  18. 112
  19. 64
  20. 300
  21. 468
  22. 216
  23. 264
  24. 120
  25. 496
  26. 192
  27. 592
  28. 376
  29. 488
  30. 528
  31. 312
  32. 600
  33. 104
  34. 488
  35. 320
  36. 568
  37. 464
  38. 160
  39. 304
  40. 388

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