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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 535 · 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. 1.25 × 8 =
  2. 2.27 × 4 =
  3. 3.14 × 8 =
  4. 4.28 × 8 =
  5. 5.68 × 4 =
  6. 6.97 × 4 =
  7. 7.25 × 4 =
  8. 8.67 × 4 =
  9. 9.125 × 4 =
  10. 10.26 × 8 =
  11. 11.80 × 4 =
  12. 12.48 × 8 =
  13. 13.38 × 4 =
  14. 14.16 × 4 =
  15. 15.32 × 8 =
  16. 16.77 × 4 =
  17. 17.23 × 8 =
  18. 18.126 × 4 =
  19. 19.155 × 4 =
  20. 20.67 × 8 =
  21. 21.73 × 8 =
  22. 22.74 × 8 =
  23. 23.82 × 4 =
  24. 24.51 × 4 =
  25. 25.57 × 8 =
  26. 26.35 × 8 =
  27. 27.12 × 8 =
  28. 28.53 × 4 =
  29. 29.17 × 8 =
  30. 30.64 × 8 =
  31. 31.59 × 4 =
  32. 32.60 × 8 =
  33. 33.120 × 4 =
  34. 34.146 × 4 =
  35. 35.97 × 4 =
  36. 36.126 × 4 =
  37. 37.138 × 4 =
  38. 38.55 × 8 =
  39. 39.24 × 4 =
  40. 40.128 × 4 =

Answer key

  1. 200
  2. 108
  3. 112
  4. 224
  5. 272
  6. 388
  7. 100
  8. 268
  9. 500
  10. 208
  11. 320
  12. 384
  13. 152
  14. 64
  15. 256
  16. 308
  17. 184
  18. 504
  19. 620
  20. 536
  21. 584
  22. 592
  23. 328
  24. 204
  25. 456
  26. 280
  27. 96
  28. 212
  29. 136
  30. 512
  31. 236
  32. 480
  33. 480
  34. 584
  35. 388
  36. 504
  37. 552
  38. 440
  39. 96
  40. 512

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