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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 325 · 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. 1.35 × 8 =
  2. 2.13 × 4 =
  3. 3.47 × 8 =
  4. 4.122 × 4 =
  5. 5.30 × 8 =
  6. 6.46 × 4 =
  7. 7.45 × 4 =
  8. 8.81 × 4 =
  9. 9.46 × 4 =
  10. 10.17 × 8 =
  11. 11.36 × 8 =
  12. 12.37 × 8 =
  13. 13.41 × 8 =
  14. 14.138 × 4 =
  15. 15.82 × 4 =
  16. 16.77 × 4 =
  17. 17.121 × 4 =
  18. 18.16 × 4 =
  19. 19.12 × 8 =
  20. 20.51 × 4 =
  21. 21.106 × 4 =
  22. 22.15 × 4 =
  23. 23.30 × 4 =
  24. 24.143 × 4 =
  25. 25.18 × 4 =
  26. 26.74 × 8 =
  27. 27.73 × 8 =
  28. 28.15 × 8 =
  29. 29.57 × 8 =
  30. 30.45 × 8 =
  31. 31.31 × 8 =
  32. 32.38 × 8 =
  33. 33.132 × 4 =
  34. 34.70 × 8 =
  35. 35.70 × 4 =
  36. 36.71 × 8 =
  37. 37.28 × 8 =
  38. 38.41 × 4 =
  39. 39.93 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 280
  2. 52
  3. 376
  4. 488
  5. 240
  6. 184
  7. 180
  8. 324
  9. 184
  10. 136
  11. 288
  12. 296
  13. 328
  14. 552
  15. 328
  16. 308
  17. 484
  18. 64
  19. 96
  20. 204
  21. 424
  22. 60
  23. 120
  24. 572
  25. 72
  26. 592
  27. 584
  28. 120
  29. 456
  30. 360
  31. 248
  32. 304
  33. 528
  34. 560
  35. 280
  36. 568
  37. 224
  38. 164
  39. 372
  40. 164

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