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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 814 · 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. 1.29 × 8 =
  2. 2.18 × 4 =
  3. 3.143 × 4 =
  4. 4.49 × 8 =
  5. 5.71 × 8 =
  6. 6.119 × 4 =
  7. 7.134 × 4 =
  8. 8.117 × 4 =
  9. 9.22 × 8 =
  10. 10.73 × 8 =
  11. 11.52 × 8 =
  12. 12.71 × 4 =
  13. 13.13 × 8 =
  14. 14.101 × 4 =
  15. 15.119 × 4 =
  16. 16.68 × 4 =
  17. 17.156 × 4 =
  18. 18.31 × 8 =
  19. 19.53 × 4 =
  20. 20.82 × 4 =
  21. 21.29 × 8 =
  22. 22.66 × 8 =
  23. 23.13 × 4 =
  24. 24.136 × 4 =
  25. 25.134 × 4 =
  26. 26.73 × 8 =
  27. 27.70 × 8 =
  28. 28.119 × 4 =
  29. 29.59 × 4 =
  30. 30.136 × 4 =
  31. 31.13 × 4 =
  32. 32.159 × 4 =
  33. 33.96 × 4 =
  34. 34.32 × 8 =
  35. 35.35 × 8 =
  36. 36.58 × 8 =
  37. 37.27 × 8 =
  38. 38.16 × 4 =
  39. 39.99 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 232
  2. 72
  3. 572
  4. 392
  5. 568
  6. 476
  7. 536
  8. 468
  9. 176
  10. 584
  11. 416
  12. 284
  13. 104
  14. 404
  15. 476
  16. 272
  17. 624
  18. 248
  19. 212
  20. 328
  21. 232
  22. 528
  23. 52
  24. 544
  25. 536
  26. 584
  27. 560
  28. 476
  29. 236
  30. 544
  31. 52
  32. 636
  33. 384
  34. 256
  35. 280
  36. 464
  37. 216
  38. 64
  39. 396
  40. 288

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