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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 206 · 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. 1.58 × 4 =
  2. 2.27 × 8 =
  3. 3.47 × 8 =
  4. 4.128 × 4 =
  5. 5.40 × 8 =
  6. 6.105 × 4 =
  7. 7.87 × 4 =
  8. 8.95 × 4 =
  9. 9.49 × 8 =
  10. 10.71 × 8 =
  11. 11.103 × 4 =
  12. 12.44 × 4 =
  13. 13.142 × 4 =
  14. 14.32 × 8 =
  15. 15.73 × 8 =
  16. 16.37 × 4 =
  17. 17.104 × 4 =
  18. 18.50 × 4 =
  19. 19.60 × 4 =
  20. 20.80 × 4 =
  21. 21.142 × 4 =
  22. 22.66 × 8 =
  23. 23.42 × 8 =
  24. 24.72 × 8 =
  25. 25.27 × 4 =
  26. 26.27 × 8 =
  27. 27.23 × 4 =
  28. 28.73 × 8 =
  29. 29.38 × 4 =
  30. 30.150 × 4 =
  31. 31.31 × 4 =
  32. 32.45 × 8 =
  33. 33.35 × 8 =
  34. 34.61 × 4 =
  35. 35.72 × 8 =
  36. 36.73 × 8 =
  37. 37.43 × 8 =
  38. 38.100 × 4 =
  39. 39.63 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 232
  2. 216
  3. 376
  4. 512
  5. 320
  6. 420
  7. 348
  8. 380
  9. 392
  10. 568
  11. 412
  12. 176
  13. 568
  14. 256
  15. 584
  16. 148
  17. 416
  18. 200
  19. 240
  20. 320
  21. 568
  22. 528
  23. 336
  24. 576
  25. 108
  26. 216
  27. 92
  28. 584
  29. 152
  30. 600
  31. 124
  32. 360
  33. 280
  34. 244
  35. 576
  36. 584
  37. 344
  38. 400
  39. 252
  40. 432

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