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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 622 · 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. 1.18 × 8 =
  2. 2.100 × 4 =
  3. 3.28 × 4 =
  4. 4.109 × 4 =
  5. 5.15 × 8 =
  6. 6.111 × 4 =
  7. 7.113 × 4 =
  8. 8.94 × 4 =
  9. 9.70 × 8 =
  10. 10.49 × 8 =
  11. 11.32 × 4 =
  12. 12.131 × 4 =
  13. 13.31 × 8 =
  14. 14.30 × 8 =
  15. 15.94 × 4 =
  16. 16.81 × 4 =
  17. 17.28 × 8 =
  18. 18.29 × 8 =
  19. 19.52 × 4 =
  20. 20.22 × 8 =
  21. 21.71 × 8 =
  22. 22.39 × 8 =
  23. 23.17 × 8 =
  24. 24.56 × 8 =
  25. 25.38 × 4 =
  26. 26.74 × 4 =
  27. 27.53 × 4 =
  28. 28.70 × 4 =
  29. 29.46 × 4 =
  30. 30.109 × 4 =
  31. 31.48 × 8 =
  32. 32.130 × 4 =
  33. 33.25 × 4 =
  34. 34.97 × 4 =
  35. 35.19 × 4 =
  36. 36.20 × 8 =
  37. 37.45 × 8 =
  38. 38.88 × 4 =
  39. 39.32 × 8 =
  40. 40.109 × 4 =

Answer key

  1. 144
  2. 400
  3. 112
  4. 436
  5. 120
  6. 444
  7. 452
  8. 376
  9. 560
  10. 392
  11. 128
  12. 524
  13. 248
  14. 240
  15. 376
  16. 324
  17. 224
  18. 232
  19. 208
  20. 176
  21. 568
  22. 312
  23. 136
  24. 448
  25. 152
  26. 296
  27. 212
  28. 280
  29. 184
  30. 436
  31. 384
  32. 520
  33. 100
  34. 388
  35. 76
  36. 160
  37. 360
  38. 352
  39. 256
  40. 436

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