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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 286 · 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. 1.34 × 8 =
  2. 2.33 × 8 =
  3. 3.121 × 4 =
  4. 4.46 × 4 =
  5. 5.14 × 4 =
  6. 6.32 × 8 =
  7. 7.19 × 4 =
  8. 8.73 × 8 =
  9. 9.19 × 8 =
  10. 10.93 × 4 =
  11. 11.29 × 8 =
  12. 12.38 × 8 =
  13. 13.73 × 8 =
  14. 14.17 × 4 =
  15. 15.141 × 4 =
  16. 16.65 × 8 =
  17. 17.135 × 4 =
  18. 18.48 × 8 =
  19. 19.65 × 8 =
  20. 20.139 × 4 =
  21. 21.17 × 8 =
  22. 22.91 × 4 =
  23. 23.113 × 4 =
  24. 24.29 × 4 =
  25. 25.50 × 8 =
  26. 26.116 × 4 =
  27. 27.41 × 8 =
  28. 28.48 × 8 =
  29. 29.72 × 8 =
  30. 30.59 × 4 =
  31. 31.12 × 8 =
  32. 32.24 × 4 =
  33. 33.51 × 8 =
  34. 34.32 × 8 =
  35. 35.17 × 4 =
  36. 36.100 × 4 =
  37. 37.69 × 4 =
  38. 38.62 × 8 =
  39. 39.103 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 272
  2. 264
  3. 484
  4. 184
  5. 56
  6. 256
  7. 76
  8. 584
  9. 152
  10. 372
  11. 232
  12. 304
  13. 584
  14. 68
  15. 564
  16. 520
  17. 540
  18. 384
  19. 520
  20. 556
  21. 136
  22. 364
  23. 452
  24. 116
  25. 400
  26. 464
  27. 328
  28. 384
  29. 576
  30. 236
  31. 96
  32. 96
  33. 408
  34. 256
  35. 68
  36. 400
  37. 276
  38. 496
  39. 412
  40. 152

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