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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 475 · 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. 1.38 × 8 =
  2. 2.47 × 4 =
  3. 3.55 × 4 =
  4. 4.151 × 4 =
  5. 5.67 × 8 =
  6. 6.61 × 8 =
  7. 7.27 × 8 =
  8. 8.150 × 4 =
  9. 9.42 × 8 =
  10. 10.26 × 8 =
  11. 11.27 × 8 =
  12. 12.53 × 8 =
  13. 13.64 × 8 =
  14. 14.107 × 4 =
  15. 15.113 × 4 =
  16. 16.18 × 4 =
  17. 17.76 × 4 =
  18. 18.48 × 8 =
  19. 19.89 × 4 =
  20. 20.86 × 4 =
  21. 21.21 × 8 =
  22. 22.46 × 8 =
  23. 23.61 × 8 =
  24. 24.14 × 4 =
  25. 25.70 × 4 =
  26. 26.123 × 4 =
  27. 27.31 × 8 =
  28. 28.42 × 8 =
  29. 29.30 × 8 =
  30. 30.71 × 4 =
  31. 31.19 × 4 =
  32. 32.62 × 8 =
  33. 33.29 × 4 =
  34. 34.78 × 4 =
  35. 35.136 × 4 =
  36. 36.35 × 8 =
  37. 37.16 × 4 =
  38. 38.107 × 4 =
  39. 39.36 × 8 =
  40. 40.116 × 4 =

Answer key

  1. 304
  2. 188
  3. 220
  4. 604
  5. 536
  6. 488
  7. 216
  8. 600
  9. 336
  10. 208
  11. 216
  12. 424
  13. 512
  14. 428
  15. 452
  16. 72
  17. 304
  18. 384
  19. 356
  20. 344
  21. 168
  22. 368
  23. 488
  24. 56
  25. 280
  26. 492
  27. 248
  28. 336
  29. 240
  30. 284
  31. 76
  32. 496
  33. 116
  34. 312
  35. 544
  36. 280
  37. 64
  38. 428
  39. 288
  40. 464

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