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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 148 · 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. 1.159 × 4 =
  2. 2.71 × 8 =
  3. 3.15 × 8 =
  4. 4.69 × 4 =
  5. 5.28 × 8 =
  6. 6.60 × 4 =
  7. 7.108 × 4 =
  8. 8.80 × 4 =
  9. 9.37 × 8 =
  10. 10.89 × 4 =
  11. 11.126 × 4 =
  12. 12.26 × 8 =
  13. 13.69 × 8 =
  14. 14.50 × 8 =
  15. 15.102 × 4 =
  16. 16.42 × 8 =
  17. 17.110 × 4 =
  18. 18.16 × 4 =
  19. 19.51 × 8 =
  20. 20.57 × 8 =
  21. 21.60 × 8 =
  22. 22.83 × 4 =
  23. 23.34 × 4 =
  24. 24.60 × 4 =
  25. 25.37 × 8 =
  26. 26.117 × 4 =
  27. 27.44 × 8 =
  28. 28.56 × 8 =
  29. 29.49 × 4 =
  30. 30.20 × 4 =
  31. 31.30 × 8 =
  32. 32.108 × 4 =
  33. 33.40 × 4 =
  34. 34.14 × 8 =
  35. 35.30 × 8 =
  36. 36.48 × 8 =
  37. 37.23 × 8 =
  38. 38.141 × 4 =
  39. 39.115 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 636
  2. 568
  3. 120
  4. 276
  5. 224
  6. 240
  7. 432
  8. 320
  9. 296
  10. 356
  11. 504
  12. 208
  13. 552
  14. 400
  15. 408
  16. 336
  17. 440
  18. 64
  19. 408
  20. 456
  21. 480
  22. 332
  23. 136
  24. 240
  25. 296
  26. 468
  27. 352
  28. 448
  29. 196
  30. 80
  31. 240
  32. 432
  33. 160
  34. 112
  35. 240
  36. 384
  37. 184
  38. 564
  39. 460
  40. 140

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