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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 871 · 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. 1.128 × 4 =
  2. 2.149 × 4 =
  3. 3.75 × 4 =
  4. 4.41 × 4 =
  5. 5.84 × 4 =
  6. 6.124 × 4 =
  7. 7.59 × 8 =
  8. 8.44 × 8 =
  9. 9.56 × 8 =
  10. 10.25 × 4 =
  11. 11.83 × 4 =
  12. 12.28 × 8 =
  13. 13.56 × 8 =
  14. 14.148 × 4 =
  15. 15.66 × 8 =
  16. 16.39 × 4 =
  17. 17.25 × 4 =
  18. 18.39 × 4 =
  19. 19.144 × 4 =
  20. 20.134 × 4 =
  21. 21.41 × 8 =
  22. 22.23 × 8 =
  23. 23.118 × 4 =
  24. 24.17 × 4 =
  25. 25.27 × 8 =
  26. 26.108 × 4 =
  27. 27.53 × 8 =
  28. 28.53 × 8 =
  29. 29.135 × 4 =
  30. 30.51 × 4 =
  31. 31.26 × 8 =
  32. 32.128 × 4 =
  33. 33.86 × 4 =
  34. 34.61 × 8 =
  35. 35.67 × 4 =
  36. 36.54 × 8 =
  37. 37.43 × 8 =
  38. 38.96 × 4 =
  39. 39.35 × 4 =
  40. 40.77 × 4 =

Answer key

  1. 512
  2. 596
  3. 300
  4. 164
  5. 336
  6. 496
  7. 472
  8. 352
  9. 448
  10. 100
  11. 332
  12. 224
  13. 448
  14. 592
  15. 528
  16. 156
  17. 100
  18. 156
  19. 576
  20. 536
  21. 328
  22. 184
  23. 472
  24. 68
  25. 216
  26. 432
  27. 424
  28. 424
  29. 540
  30. 204
  31. 208
  32. 512
  33. 344
  34. 488
  35. 268
  36. 432
  37. 344
  38. 384
  39. 140
  40. 308

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