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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 733 · 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. 1.73 × 8 =
  2. 2.74 × 8 =
  3. 3.135 × 4 =
  4. 4.14 × 4 =
  5. 5.42 × 8 =
  6. 6.53 × 8 =
  7. 7.42 × 8 =
  8. 8.62 × 4 =
  9. 9.64 × 8 =
  10. 10.25 × 4 =
  11. 11.91 × 4 =
  12. 12.20 × 8 =
  13. 13.60 × 4 =
  14. 14.84 × 4 =
  15. 15.63 × 4 =
  16. 16.39 × 4 =
  17. 17.87 × 4 =
  18. 18.25 × 4 =
  19. 19.42 × 8 =
  20. 20.34 × 8 =
  21. 21.23 × 8 =
  22. 22.139 × 4 =
  23. 23.75 × 8 =
  24. 24.92 × 4 =
  25. 25.109 × 4 =
  26. 26.103 × 4 =
  27. 27.16 × 8 =
  28. 28.97 × 4 =
  29. 29.55 × 8 =
  30. 30.37 × 8 =
  31. 31.59 × 8 =
  32. 32.72 × 8 =
  33. 33.70 × 8 =
  34. 34.78 × 4 =
  35. 35.77 × 4 =
  36. 36.55 × 4 =
  37. 37.53 × 8 =
  38. 38.128 × 4 =
  39. 39.26 × 8 =
  40. 40.87 × 4 =

Answer key

  1. 584
  2. 592
  3. 540
  4. 56
  5. 336
  6. 424
  7. 336
  8. 248
  9. 512
  10. 100
  11. 364
  12. 160
  13. 240
  14. 336
  15. 252
  16. 156
  17. 348
  18. 100
  19. 336
  20. 272
  21. 184
  22. 556
  23. 600
  24. 368
  25. 436
  26. 412
  27. 128
  28. 388
  29. 440
  30. 296
  31. 472
  32. 576
  33. 560
  34. 312
  35. 308
  36. 220
  37. 424
  38. 512
  39. 208
  40. 348

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