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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 775 · 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. 2.65 × 4 =
  3. 3.136 × 4 =
  4. 4.18 × 8 =
  5. 5.25 × 8 =
  6. 6.92 × 4 =
  7. 7.37 × 8 =
  8. 8.53 × 8 =
  9. 9.25 × 8 =
  10. 10.26 × 4 =
  11. 11.33 × 8 =
  12. 12.54 × 8 =
  13. 13.17 × 4 =
  14. 14.47 × 8 =
  15. 15.13 × 4 =
  16. 16.51 × 8 =
  17. 17.60 × 8 =
  18. 18.53 × 8 =
  19. 19.37 × 4 =
  20. 20.59 × 4 =
  21. 21.103 × 4 =
  22. 22.27 × 4 =
  23. 23.27 × 8 =
  24. 24.95 × 4 =
  25. 25.51 × 8 =
  26. 26.73 × 8 =
  27. 27.59 × 4 =
  28. 28.37 × 8 =
  29. 29.62 × 8 =
  30. 30.17 × 8 =
  31. 31.63 × 8 =
  32. 32.42 × 8 =
  33. 33.64 × 8 =
  34. 34.67 × 8 =
  35. 35.22 × 4 =
  36. 36.19 × 4 =
  37. 37.39 × 8 =
  38. 38.28 × 8 =
  39. 39.62 × 4 =
  40. 40.13 × 4 =

Answer key

  1. 272
  2. 260
  3. 544
  4. 144
  5. 200
  6. 368
  7. 296
  8. 424
  9. 200
  10. 104
  11. 264
  12. 432
  13. 68
  14. 376
  15. 52
  16. 408
  17. 480
  18. 424
  19. 148
  20. 236
  21. 412
  22. 108
  23. 216
  24. 380
  25. 408
  26. 584
  27. 236
  28. 296
  29. 496
  30. 136
  31. 504
  32. 336
  33. 512
  34. 536
  35. 88
  36. 76
  37. 312
  38. 224
  39. 248
  40. 52

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