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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 574 · 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. 1.127 × 4 =
  2. 2.141 × 4 =
  3. 3.122 × 4 =
  4. 4.47 × 4 =
  5. 5.105 × 4 =
  6. 6.57 × 4 =
  7. 7.53 × 4 =
  8. 8.48 × 4 =
  9. 9.66 × 8 =
  10. 10.81 × 4 =
  11. 11.44 × 4 =
  12. 12.141 × 4 =
  13. 13.96 × 4 =
  14. 14.124 × 4 =
  15. 15.75 × 4 =
  16. 16.70 × 8 =
  17. 17.97 × 4 =
  18. 18.90 × 4 =
  19. 19.22 × 8 =
  20. 20.68 × 8 =
  21. 21.51 × 8 =
  22. 22.70 × 8 =
  23. 23.18 × 4 =
  24. 24.27 × 4 =
  25. 25.121 × 4 =
  26. 26.135 × 4 =
  27. 27.112 × 4 =
  28. 28.68 × 8 =
  29. 29.61 × 4 =
  30. 30.13 × 4 =
  31. 31.28 × 8 =
  32. 32.20 × 8 =
  33. 33.24 × 4 =
  34. 34.29 × 8 =
  35. 35.67 × 8 =
  36. 36.141 × 4 =
  37. 37.37 × 8 =
  38. 38.54 × 4 =
  39. 39.63 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 508
  2. 564
  3. 488
  4. 188
  5. 420
  6. 228
  7. 212
  8. 192
  9. 528
  10. 324
  11. 176
  12. 564
  13. 384
  14. 496
  15. 300
  16. 560
  17. 388
  18. 360
  19. 176
  20. 544
  21. 408
  22. 560
  23. 72
  24. 108
  25. 484
  26. 540
  27. 448
  28. 544
  29. 244
  30. 52
  31. 224
  32. 160
  33. 96
  34. 232
  35. 536
  36. 564
  37. 296
  38. 216
  39. 504
  40. 56

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