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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 839 · 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. 2.67 × 8 =
  3. 3.46 × 4 =
  4. 4.55 × 4 =
  5. 5.128 × 4 =
  6. 6.107 × 4 =
  7. 7.46 × 4 =
  8. 8.52 × 4 =
  9. 9.44 × 4 =
  10. 10.66 × 8 =
  11. 11.45 × 8 =
  12. 12.92 × 4 =
  13. 13.25 × 8 =
  14. 14.46 × 8 =
  15. 15.25 × 4 =
  16. 16.149 × 4 =
  17. 17.34 × 8 =
  18. 18.158 × 4 =
  19. 19.23 × 4 =
  20. 20.124 × 4 =
  21. 21.39 × 8 =
  22. 22.105 × 4 =
  23. 23.16 × 8 =
  24. 24.35 × 8 =
  25. 25.94 × 4 =
  26. 26.42 × 4 =
  27. 27.60 × 4 =
  28. 28.38 × 8 =
  29. 29.54 × 4 =
  30. 30.45 × 4 =
  31. 31.112 × 4 =
  32. 32.15 × 8 =
  33. 33.24 × 4 =
  34. 34.100 × 4 =
  35. 35.90 × 4 =
  36. 36.121 × 4 =
  37. 37.61 × 8 =
  38. 38.22 × 8 =
  39. 39.29 × 8 =
  40. 40.97 × 4 =

Answer key

  1. 204
  2. 536
  3. 184
  4. 220
  5. 512
  6. 428
  7. 184
  8. 208
  9. 176
  10. 528
  11. 360
  12. 368
  13. 200
  14. 368
  15. 100
  16. 596
  17. 272
  18. 632
  19. 92
  20. 496
  21. 312
  22. 420
  23. 128
  24. 280
  25. 376
  26. 168
  27. 240
  28. 304
  29. 216
  30. 180
  31. 448
  32. 120
  33. 96
  34. 400
  35. 360
  36. 484
  37. 488
  38. 176
  39. 232
  40. 388

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