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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 149 · 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. 1.33 × 4 =
  2. 2.149 × 4 =
  3. 3.98 × 4 =
  4. 4.85 × 4 =
  5. 5.73 × 8 =
  6. 6.119 × 4 =
  7. 7.147 × 4 =
  8. 8.24 × 8 =
  9. 9.78 × 4 =
  10. 10.116 × 4 =
  11. 11.141 × 4 =
  12. 12.112 × 4 =
  13. 13.87 × 4 =
  14. 14.61 × 4 =
  15. 15.26 × 8 =
  16. 16.40 × 4 =
  17. 17.30 × 4 =
  18. 18.29 × 8 =
  19. 19.134 × 4 =
  20. 20.14 × 8 =
  21. 21.26 × 4 =
  22. 22.34 × 8 =
  23. 23.123 × 4 =
  24. 24.29 × 8 =
  25. 25.113 × 4 =
  26. 26.94 × 4 =
  27. 27.54 × 4 =
  28. 28.66 × 8 =
  29. 29.21 × 4 =
  30. 30.90 × 4 =
  31. 31.75 × 8 =
  32. 32.53 × 4 =
  33. 33.47 × 8 =
  34. 34.64 × 4 =
  35. 35.59 × 8 =
  36. 36.28 × 8 =
  37. 37.48 × 4 =
  38. 38.60 × 8 =
  39. 39.55 × 4 =
  40. 40.81 × 4 =

Answer key

  1. 132
  2. 596
  3. 392
  4. 340
  5. 584
  6. 476
  7. 588
  8. 192
  9. 312
  10. 464
  11. 564
  12. 448
  13. 348
  14. 244
  15. 208
  16. 160
  17. 120
  18. 232
  19. 536
  20. 112
  21. 104
  22. 272
  23. 492
  24. 232
  25. 452
  26. 376
  27. 216
  28. 528
  29. 84
  30. 360
  31. 600
  32. 212
  33. 376
  34. 256
  35. 472
  36. 224
  37. 192
  38. 480
  39. 220
  40. 324

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