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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 823 · 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. 1.30 × 8 =
  2. 2.58 × 8 =
  3. 3.159 × 4 =
  4. 4.51 × 8 =
  5. 5.13 × 4 =
  6. 6.37 × 8 =
  7. 7.148 × 4 =
  8. 8.122 × 4 =
  9. 9.143 × 4 =
  10. 10.29 × 4 =
  11. 11.14 × 4 =
  12. 12.30 × 4 =
  13. 13.151 × 4 =
  14. 14.19 × 8 =
  15. 15.64 × 8 =
  16. 16.50 × 8 =
  17. 17.43 × 8 =
  18. 18.15 × 8 =
  19. 19.19 × 8 =
  20. 20.28 × 8 =
  21. 21.116 × 4 =
  22. 22.60 × 8 =
  23. 23.33 × 4 =
  24. 24.42 × 8 =
  25. 25.67 × 8 =
  26. 26.68 × 8 =
  27. 27.40 × 4 =
  28. 28.22 × 4 =
  29. 29.44 × 4 =
  30. 30.51 × 8 =
  31. 31.148 × 4 =
  32. 32.23 × 4 =
  33. 33.55 × 4 =
  34. 34.82 × 4 =
  35. 35.103 × 4 =
  36. 36.111 × 4 =
  37. 37.128 × 4 =
  38. 38.85 × 4 =
  39. 39.97 × 4 =
  40. 40.109 × 4 =

Answer key

  1. 240
  2. 464
  3. 636
  4. 408
  5. 52
  6. 296
  7. 592
  8. 488
  9. 572
  10. 116
  11. 56
  12. 120
  13. 604
  14. 152
  15. 512
  16. 400
  17. 344
  18. 120
  19. 152
  20. 224
  21. 464
  22. 480
  23. 132
  24. 336
  25. 536
  26. 544
  27. 160
  28. 88
  29. 176
  30. 408
  31. 592
  32. 92
  33. 220
  34. 328
  35. 412
  36. 444
  37. 512
  38. 340
  39. 388
  40. 436

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