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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 662 · 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. 1.53 × 4 =
  2. 2.63 × 8 =
  3. 3.66 × 8 =
  4. 4.66 × 8 =
  5. 5.66 × 4 =
  6. 6.61 × 4 =
  7. 7.74 × 8 =
  8. 8.30 × 4 =
  9. 9.39 × 8 =
  10. 10.155 × 4 =
  11. 11.52 × 8 =
  12. 12.40 × 4 =
  13. 13.41 × 8 =
  14. 14.66 × 8 =
  15. 15.124 × 4 =
  16. 16.24 × 4 =
  17. 17.109 × 4 =
  18. 18.17 × 8 =
  19. 19.14 × 8 =
  20. 20.33 × 8 =
  21. 21.69 × 8 =
  22. 22.66 × 8 =
  23. 23.33 × 8 =
  24. 24.66 × 8 =
  25. 25.22 × 8 =
  26. 26.67 × 8 =
  27. 27.16 × 4 =
  28. 28.42 × 8 =
  29. 29.127 × 4 =
  30. 30.45 × 8 =
  31. 31.42 × 8 =
  32. 32.41 × 4 =
  33. 33.157 × 4 =
  34. 34.103 × 4 =
  35. 35.125 × 4 =
  36. 36.143 × 4 =
  37. 37.131 × 4 =
  38. 38.61 × 8 =
  39. 39.89 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 212
  2. 504
  3. 528
  4. 528
  5. 264
  6. 244
  7. 592
  8. 120
  9. 312
  10. 620
  11. 416
  12. 160
  13. 328
  14. 528
  15. 496
  16. 96
  17. 436
  18. 136
  19. 112
  20. 264
  21. 552
  22. 528
  23. 264
  24. 528
  25. 176
  26. 536
  27. 64
  28. 336
  29. 508
  30. 360
  31. 336
  32. 164
  33. 628
  34. 412
  35. 500
  36. 572
  37. 524
  38. 488
  39. 356
  40. 408

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