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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 174 · 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. 1.67 × 8 =
  2. 2.27 × 4 =
  3. 3.25 × 4 =
  4. 4.98 × 4 =
  5. 5.32 × 4 =
  6. 6.144 × 4 =
  7. 7.76 × 4 =
  8. 8.128 × 4 =
  9. 9.49 × 8 =
  10. 10.27 × 8 =
  11. 11.59 × 4 =
  12. 12.149 × 4 =
  13. 13.22 × 8 =
  14. 14.56 × 4 =
  15. 15.37 × 4 =
  16. 16.16 × 8 =
  17. 17.154 × 4 =
  18. 18.44 × 8 =
  19. 19.17 × 4 =
  20. 20.20 × 8 =
  21. 21.55 × 8 =
  22. 22.15 × 8 =
  23. 23.71 × 8 =
  24. 24.15 × 8 =
  25. 25.32 × 8 =
  26. 26.138 × 4 =
  27. 27.62 × 8 =
  28. 28.101 × 4 =
  29. 29.77 × 4 =
  30. 30.24 × 4 =
  31. 31.133 × 4 =
  32. 32.46 × 8 =
  33. 33.50 × 4 =
  34. 34.49 × 8 =
  35. 35.22 × 8 =
  36. 36.44 × 8 =
  37. 37.29 × 8 =
  38. 38.72 × 8 =
  39. 39.153 × 4 =
  40. 40.66 × 8 =

Answer key

  1. 536
  2. 108
  3. 100
  4. 392
  5. 128
  6. 576
  7. 304
  8. 512
  9. 392
  10. 216
  11. 236
  12. 596
  13. 176
  14. 224
  15. 148
  16. 128
  17. 616
  18. 352
  19. 68
  20. 160
  21. 440
  22. 120
  23. 568
  24. 120
  25. 256
  26. 552
  27. 496
  28. 404
  29. 308
  30. 96
  31. 532
  32. 368
  33. 200
  34. 392
  35. 176
  36. 352
  37. 232
  38. 576
  39. 612
  40. 528

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