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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 831 · 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. 1.115 × 4 =
  2. 2.54 × 8 =
  3. 3.71 × 8 =
  4. 4.66 × 8 =
  5. 5.43 × 4 =
  6. 6.125 × 4 =
  7. 7.56 × 8 =
  8. 8.27 × 4 =
  9. 9.31 × 8 =
  10. 10.22 × 8 =
  11. 11.20 × 8 =
  12. 12.113 × 4 =
  13. 13.71 × 8 =
  14. 14.53 × 4 =
  15. 15.63 × 8 =
  16. 16.68 × 4 =
  17. 17.20 × 4 =
  18. 18.50 × 4 =
  19. 19.124 × 4 =
  20. 20.149 × 4 =
  21. 21.111 × 4 =
  22. 22.48 × 8 =
  23. 23.55 × 8 =
  24. 24.63 × 8 =
  25. 25.64 × 8 =
  26. 26.42 × 4 =
  27. 27.124 × 4 =
  28. 28.65 × 8 =
  29. 29.16 × 8 =
  30. 30.19 × 8 =
  31. 31.39 × 8 =
  32. 32.75 × 8 =
  33. 33.71 × 4 =
  34. 34.133 × 4 =
  35. 35.126 × 4 =
  36. 36.28 × 4 =
  37. 37.63 × 8 =
  38. 38.15 × 4 =
  39. 39.48 × 8 =
  40. 40.58 × 8 =

Answer key

  1. 460
  2. 432
  3. 568
  4. 528
  5. 172
  6. 500
  7. 448
  8. 108
  9. 248
  10. 176
  11. 160
  12. 452
  13. 568
  14. 212
  15. 504
  16. 272
  17. 80
  18. 200
  19. 496
  20. 596
  21. 444
  22. 384
  23. 440
  24. 504
  25. 512
  26. 168
  27. 496
  28. 520
  29. 128
  30. 152
  31. 312
  32. 600
  33. 284
  34. 532
  35. 504
  36. 112
  37. 504
  38. 60
  39. 384
  40. 464

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