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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 264 · 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. 1.123 × 4 =
  2. 2.153 × 4 =
  3. 3.128 × 4 =
  4. 4.12 × 8 =
  5. 5.47 × 8 =
  6. 6.32 × 8 =
  7. 7.41 × 8 =
  8. 8.103 × 4 =
  9. 9.28 × 4 =
  10. 10.138 × 4 =
  11. 11.19 × 8 =
  12. 12.67 × 8 =
  13. 13.25 × 4 =
  14. 14.135 × 4 =
  15. 15.101 × 4 =
  16. 16.40 × 8 =
  17. 17.150 × 4 =
  18. 18.39 × 4 =
  19. 19.97 × 4 =
  20. 20.125 × 4 =
  21. 21.19 × 8 =
  22. 22.24 × 8 =
  23. 23.60 × 8 =
  24. 24.75 × 8 =
  25. 25.12 × 8 =
  26. 26.125 × 4 =
  27. 27.36 × 8 =
  28. 28.27 × 8 =
  29. 29.66 × 8 =
  30. 30.27 × 4 =
  31. 31.91 × 4 =
  32. 32.122 × 4 =
  33. 33.76 × 4 =
  34. 34.112 × 4 =
  35. 35.25 × 8 =
  36. 36.59 × 4 =
  37. 37.71 × 8 =
  38. 38.68 × 8 =
  39. 39.65 × 8 =
  40. 40.44 × 4 =

Answer key

  1. 492
  2. 612
  3. 512
  4. 96
  5. 376
  6. 256
  7. 328
  8. 412
  9. 112
  10. 552
  11. 152
  12. 536
  13. 100
  14. 540
  15. 404
  16. 320
  17. 600
  18. 156
  19. 388
  20. 500
  21. 152
  22. 192
  23. 480
  24. 600
  25. 96
  26. 500
  27. 288
  28. 216
  29. 528
  30. 108
  31. 364
  32. 488
  33. 304
  34. 448
  35. 200
  36. 236
  37. 568
  38. 544
  39. 520
  40. 176

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