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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 870 · 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. 1.33 × 8 =
  2. 2.91 × 4 =
  3. 3.20 × 8 =
  4. 4.79 × 4 =
  5. 5.72 × 8 =
  6. 6.51 × 4 =
  7. 7.102 × 4 =
  8. 8.38 × 8 =
  9. 9.19 × 8 =
  10. 10.72 × 8 =
  11. 11.29 × 4 =
  12. 12.63 × 8 =
  13. 13.51 × 4 =
  14. 14.61 × 8 =
  15. 15.116 × 4 =
  16. 16.131 × 4 =
  17. 17.27 × 4 =
  18. 18.69 × 4 =
  19. 19.50 × 4 =
  20. 20.54 × 4 =
  21. 21.30 × 8 =
  22. 22.74 × 8 =
  23. 23.131 × 4 =
  24. 24.40 × 8 =
  25. 25.75 × 8 =
  26. 26.147 × 4 =
  27. 27.58 × 4 =
  28. 28.25 × 8 =
  29. 29.54 × 8 =
  30. 30.60 × 4 =
  31. 31.65 × 8 =
  32. 32.86 × 4 =
  33. 33.58 × 8 =
  34. 34.36 × 4 =
  35. 35.17 × 4 =
  36. 36.76 × 4 =
  37. 37.42 × 8 =
  38. 38.63 × 8 =
  39. 39.53 × 4 =
  40. 40.136 × 4 =

Answer key

  1. 264
  2. 364
  3. 160
  4. 316
  5. 576
  6. 204
  7. 408
  8. 304
  9. 152
  10. 576
  11. 116
  12. 504
  13. 204
  14. 488
  15. 464
  16. 524
  17. 108
  18. 276
  19. 200
  20. 216
  21. 240
  22. 592
  23. 524
  24. 320
  25. 600
  26. 588
  27. 232
  28. 200
  29. 432
  30. 240
  31. 520
  32. 344
  33. 464
  34. 144
  35. 68
  36. 304
  37. 336
  38. 504
  39. 212
  40. 544

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