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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 602 · 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. 1.86 × 4 =
  2. 2.38 × 8 =
  3. 3.45 × 8 =
  4. 4.144 × 4 =
  5. 5.60 × 8 =
  6. 6.33 × 8 =
  7. 7.48 × 8 =
  8. 8.20 × 4 =
  9. 9.66 × 8 =
  10. 10.38 × 4 =
  11. 11.29 × 8 =
  12. 12.101 × 4 =
  13. 13.95 × 4 =
  14. 14.64 × 8 =
  15. 15.130 × 4 =
  16. 16.27 × 8 =
  17. 17.16 × 8 =
  18. 18.25 × 4 =
  19. 19.44 × 8 =
  20. 20.33 × 8 =
  21. 21.34 × 8 =
  22. 22.143 × 4 =
  23. 23.32 × 4 =
  24. 24.143 × 4 =
  25. 25.47 × 8 =
  26. 26.41 × 4 =
  27. 27.27 × 8 =
  28. 28.40 × 8 =
  29. 29.36 × 4 =
  30. 30.153 × 4 =
  31. 31.64 × 8 =
  32. 32.43 × 8 =
  33. 33.23 × 4 =
  34. 34.21 × 8 =
  35. 35.103 × 4 =
  36. 36.59 × 4 =
  37. 37.17 × 8 =
  38. 38.160 × 4 =
  39. 39.137 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 344
  2. 304
  3. 360
  4. 576
  5. 480
  6. 264
  7. 384
  8. 80
  9. 528
  10. 152
  11. 232
  12. 404
  13. 380
  14. 512
  15. 520
  16. 216
  17. 128
  18. 100
  19. 352
  20. 264
  21. 272
  22. 572
  23. 128
  24. 572
  25. 376
  26. 164
  27. 216
  28. 320
  29. 144
  30. 612
  31. 512
  32. 344
  33. 92
  34. 168
  35. 412
  36. 236
  37. 136
  38. 640
  39. 548
  40. 164

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