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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 73 · 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. 1.71 × 8 =
  2. 2.34 × 8 =
  3. 3.17 × 8 =
  4. 4.147 × 4 =
  5. 5.132 × 4 =
  6. 6.119 × 4 =
  7. 7.22 × 8 =
  8. 8.23 × 8 =
  9. 9.29 × 8 =
  10. 10.133 × 4 =
  11. 11.41 × 8 =
  12. 12.49 × 8 =
  13. 13.60 × 8 =
  14. 14.127 × 4 =
  15. 15.138 × 4 =
  16. 16.52 × 8 =
  17. 17.54 × 8 =
  18. 18.19 × 8 =
  19. 19.22 × 4 =
  20. 20.29 × 8 =
  21. 21.139 × 4 =
  22. 22.71 × 8 =
  23. 23.26 × 8 =
  24. 24.28 × 8 =
  25. 25.128 × 4 =
  26. 26.23 × 8 =
  27. 27.41 × 8 =
  28. 28.59 × 8 =
  29. 29.47 × 8 =
  30. 30.29 × 4 =
  31. 31.150 × 4 =
  32. 32.150 × 4 =
  33. 33.36 × 8 =
  34. 34.50 × 4 =
  35. 35.45 × 8 =
  36. 36.61 × 8 =
  37. 37.73 × 8 =
  38. 38.138 × 4 =
  39. 39.105 × 4 =
  40. 40.111 × 4 =

Answer key

  1. 568
  2. 272
  3. 136
  4. 588
  5. 528
  6. 476
  7. 176
  8. 184
  9. 232
  10. 532
  11. 328
  12. 392
  13. 480
  14. 508
  15. 552
  16. 416
  17. 432
  18. 152
  19. 88
  20. 232
  21. 556
  22. 568
  23. 208
  24. 224
  25. 512
  26. 184
  27. 328
  28. 472
  29. 376
  30. 116
  31. 600
  32. 600
  33. 288
  34. 200
  35. 360
  36. 488
  37. 584
  38. 552
  39. 420
  40. 444

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