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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 90 · 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. 1.14 × 8 =
  2. 2.75 × 4 =
  3. 3.151 × 4 =
  4. 4.37 × 4 =
  5. 5.133 × 4 =
  6. 6.52 × 8 =
  7. 7.109 × 4 =
  8. 8.65 × 4 =
  9. 9.19 × 4 =
  10. 10.17 × 8 =
  11. 11.58 × 4 =
  12. 12.15 × 8 =
  13. 13.108 × 4 =
  14. 14.45 × 8 =
  15. 15.23 × 8 =
  16. 16.50 × 4 =
  17. 17.18 × 4 =
  18. 18.41 × 8 =
  19. 19.27 × 8 =
  20. 20.80 × 4 =
  21. 21.60 × 8 =
  22. 22.132 × 4 =
  23. 23.117 × 4 =
  24. 24.58 × 4 =
  25. 25.30 × 8 =
  26. 26.127 × 4 =
  27. 27.112 × 4 =
  28. 28.12 × 8 =
  29. 29.54 × 8 =
  30. 30.28 × 4 =
  31. 31.147 × 4 =
  32. 32.68 × 4 =
  33. 33.55 × 8 =
  34. 34.94 × 4 =
  35. 35.19 × 8 =
  36. 36.58 × 8 =
  37. 37.17 × 8 =
  38. 38.51 × 4 =
  39. 39.159 × 4 =
  40. 40.43 × 8 =

Answer key

  1. 112
  2. 300
  3. 604
  4. 148
  5. 532
  6. 416
  7. 436
  8. 260
  9. 76
  10. 136
  11. 232
  12. 120
  13. 432
  14. 360
  15. 184
  16. 200
  17. 72
  18. 328
  19. 216
  20. 320
  21. 480
  22. 528
  23. 468
  24. 232
  25. 240
  26. 508
  27. 448
  28. 96
  29. 432
  30. 112
  31. 588
  32. 272
  33. 440
  34. 376
  35. 152
  36. 464
  37. 136
  38. 204
  39. 636
  40. 344

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