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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 59 · 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. 1.51 × 4 =
  2. 2.63 × 4 =
  3. 3.21 × 8 =
  4. 4.132 × 4 =
  5. 5.71 × 8 =
  6. 6.43 × 8 =
  7. 7.61 × 8 =
  8. 8.91 × 4 =
  9. 9.128 × 4 =
  10. 10.17 × 8 =
  11. 11.22 × 8 =
  12. 12.15 × 8 =
  13. 13.50 × 4 =
  14. 14.17 × 4 =
  15. 15.44 × 8 =
  16. 16.119 × 4 =
  17. 17.116 × 4 =
  18. 18.62 × 4 =
  19. 19.24 × 4 =
  20. 20.97 × 4 =
  21. 21.146 × 4 =
  22. 22.32 × 8 =
  23. 23.75 × 4 =
  24. 24.25 × 8 =
  25. 25.48 × 8 =
  26. 26.151 × 4 =
  27. 27.69 × 8 =
  28. 28.136 × 4 =
  29. 29.131 × 4 =
  30. 30.20 × 8 =
  31. 31.23 × 4 =
  32. 32.70 × 8 =
  33. 33.79 × 4 =
  34. 34.54 × 4 =
  35. 35.115 × 4 =
  36. 36.53 × 8 =
  37. 37.111 × 4 =
  38. 38.70 × 4 =
  39. 39.109 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 204
  2. 252
  3. 168
  4. 528
  5. 568
  6. 344
  7. 488
  8. 364
  9. 512
  10. 136
  11. 176
  12. 120
  13. 200
  14. 68
  15. 352
  16. 476
  17. 464
  18. 248
  19. 96
  20. 388
  21. 584
  22. 256
  23. 300
  24. 200
  25. 384
  26. 604
  27. 552
  28. 544
  29. 524
  30. 160
  31. 92
  32. 560
  33. 316
  34. 216
  35. 460
  36. 424
  37. 444
  38. 280
  39. 436
  40. 108

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