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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 546 · 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. 1.15 × 8 =
  2. 2.75 × 4 =
  3. 3.59 × 8 =
  4. 4.143 × 4 =
  5. 5.125 × 4 =
  6. 6.31 × 4 =
  7. 7.29 × 8 =
  8. 8.56 × 8 =
  9. 9.131 × 4 =
  10. 10.45 × 8 =
  11. 11.32 × 8 =
  12. 12.57 × 8 =
  13. 13.17 × 8 =
  14. 14.74 × 8 =
  15. 15.47 × 8 =
  16. 16.52 × 8 =
  17. 17.111 × 4 =
  18. 18.52 × 8 =
  19. 19.59 × 8 =
  20. 20.62 × 8 =
  21. 21.103 × 4 =
  22. 22.70 × 8 =
  23. 23.157 × 4 =
  24. 24.71 × 8 =
  25. 25.14 × 8 =
  26. 26.48 × 4 =
  27. 27.127 × 4 =
  28. 28.61 × 4 =
  29. 29.56 × 8 =
  30. 30.52 × 8 =
  31. 31.64 × 8 =
  32. 32.103 × 4 =
  33. 33.62 × 8 =
  34. 34.75 × 4 =
  35. 35.135 × 4 =
  36. 36.56 × 8 =
  37. 37.64 × 8 =
  38. 38.96 × 4 =
  39. 39.147 × 4 =
  40. 40.27 × 8 =

Answer key

  1. 120
  2. 300
  3. 472
  4. 572
  5. 500
  6. 124
  7. 232
  8. 448
  9. 524
  10. 360
  11. 256
  12. 456
  13. 136
  14. 592
  15. 376
  16. 416
  17. 444
  18. 416
  19. 472
  20. 496
  21. 412
  22. 560
  23. 628
  24. 568
  25. 112
  26. 192
  27. 508
  28. 244
  29. 448
  30. 416
  31. 512
  32. 412
  33. 496
  34. 300
  35. 540
  36. 448
  37. 512
  38. 384
  39. 588
  40. 216

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