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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 484 · 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. 1.47 × 8 =
  2. 2.43 × 8 =
  3. 3.21 × 4 =
  4. 4.47 × 8 =
  5. 5.30 × 4 =
  6. 6.68 × 8 =
  7. 7.17 × 8 =
  8. 8.24 × 8 =
  9. 9.39 × 8 =
  10. 10.47 × 8 =
  11. 11.152 × 4 =
  12. 12.57 × 4 =
  13. 13.79 × 4 =
  14. 14.20 × 4 =
  15. 15.69 × 8 =
  16. 16.72 × 8 =
  17. 17.24 × 8 =
  18. 18.60 × 8 =
  19. 19.33 × 4 =
  20. 20.17 × 4 =
  21. 21.49 × 4 =
  22. 22.53 × 8 =
  23. 23.91 × 4 =
  24. 24.54 × 8 =
  25. 25.81 × 4 =
  26. 26.110 × 4 =
  27. 27.61 × 8 =
  28. 28.105 × 4 =
  29. 29.45 × 8 =
  30. 30.79 × 4 =
  31. 31.152 × 4 =
  32. 32.58 × 8 =
  33. 33.101 × 4 =
  34. 34.53 × 8 =
  35. 35.63 × 4 =
  36. 36.39 × 4 =
  37. 37.156 × 4 =
  38. 38.96 × 4 =
  39. 39.66 × 8 =
  40. 40.58 × 8 =

Answer key

  1. 376
  2. 344
  3. 84
  4. 376
  5. 120
  6. 544
  7. 136
  8. 192
  9. 312
  10. 376
  11. 608
  12. 228
  13. 316
  14. 80
  15. 552
  16. 576
  17. 192
  18. 480
  19. 132
  20. 68
  21. 196
  22. 424
  23. 364
  24. 432
  25. 324
  26. 440
  27. 488
  28. 420
  29. 360
  30. 316
  31. 608
  32. 464
  33. 404
  34. 424
  35. 252
  36. 156
  37. 624
  38. 384
  39. 528
  40. 464

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