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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 569 · 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. 1.31 × 8 =
  2. 2.15 × 4 =
  3. 3.123 × 4 =
  4. 4.40 × 8 =
  5. 5.153 × 4 =
  6. 6.13 × 4 =
  7. 7.148 × 4 =
  8. 8.24 × 8 =
  9. 9.113 × 4 =
  10. 10.72 × 8 =
  11. 11.35 × 8 =
  12. 12.37 × 8 =
  13. 13.25 × 8 =
  14. 14.124 × 4 =
  15. 15.135 × 4 =
  16. 16.116 × 4 =
  17. 17.28 × 4 =
  18. 18.107 × 4 =
  19. 19.73 × 8 =
  20. 20.20 × 8 =
  21. 21.16 × 8 =
  22. 22.86 × 4 =
  23. 23.14 × 8 =
  24. 24.81 × 4 =
  25. 25.128 × 4 =
  26. 26.134 × 4 =
  27. 27.137 × 4 =
  28. 28.133 × 4 =
  29. 29.31 × 8 =
  30. 30.26 × 8 =
  31. 31.95 × 4 =
  32. 32.64 × 4 =
  33. 33.31 × 8 =
  34. 34.64 × 8 =
  35. 35.47 × 8 =
  36. 36.63 × 8 =
  37. 37.66 × 4 =
  38. 38.159 × 4 =
  39. 39.75 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 248
  2. 60
  3. 492
  4. 320
  5. 612
  6. 52
  7. 592
  8. 192
  9. 452
  10. 576
  11. 280
  12. 296
  13. 200
  14. 496
  15. 540
  16. 464
  17. 112
  18. 428
  19. 584
  20. 160
  21. 128
  22. 344
  23. 112
  24. 324
  25. 512
  26. 536
  27. 548
  28. 532
  29. 248
  30. 208
  31. 380
  32. 256
  33. 248
  34. 512
  35. 376
  36. 504
  37. 264
  38. 636
  39. 600
  40. 104

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