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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 761 · 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. 1.41 × 8 =
  2. 2.53 × 4 =
  3. 3.59 × 8 =
  4. 4.21 × 8 =
  5. 5.64 × 8 =
  6. 6.145 × 4 =
  7. 7.81 × 4 =
  8. 8.31 × 8 =
  9. 9.59 × 8 =
  10. 10.82 × 4 =
  11. 11.56 × 4 =
  12. 12.149 × 4 =
  13. 13.121 × 4 =
  14. 14.52 × 8 =
  15. 15.33 × 8 =
  16. 16.58 × 8 =
  17. 17.13 × 8 =
  18. 18.134 × 4 =
  19. 19.102 × 4 =
  20. 20.148 × 4 =
  21. 21.26 × 8 =
  22. 22.53 × 8 =
  23. 23.31 × 8 =
  24. 24.14 × 4 =
  25. 25.71 × 8 =
  26. 26.141 × 4 =
  27. 27.149 × 4 =
  28. 28.34 × 8 =
  29. 29.110 × 4 =
  30. 30.14 × 8 =
  31. 31.31 × 8 =
  32. 32.54 × 8 =
  33. 33.49 × 8 =
  34. 34.73 × 4 =
  35. 35.41 × 8 =
  36. 36.15 × 4 =
  37. 37.59 × 8 =
  38. 38.136 × 4 =
  39. 39.27 × 8 =
  40. 40.53 × 4 =

Answer key

  1. 328
  2. 212
  3. 472
  4. 168
  5. 512
  6. 580
  7. 324
  8. 248
  9. 472
  10. 328
  11. 224
  12. 596
  13. 484
  14. 416
  15. 264
  16. 464
  17. 104
  18. 536
  19. 408
  20. 592
  21. 208
  22. 424
  23. 248
  24. 56
  25. 568
  26. 564
  27. 596
  28. 272
  29. 440
  30. 112
  31. 248
  32. 432
  33. 392
  34. 292
  35. 328
  36. 60
  37. 472
  38. 544
  39. 216
  40. 212

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