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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 928 · 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. 1.45 × 4 =
  2. 2.111 × 4 =
  3. 3.43 × 8 =
  4. 4.25 × 8 =
  5. 5.37 × 8 =
  6. 6.27 × 4 =
  7. 7.55 × 4 =
  8. 8.37 × 8 =
  9. 9.47 × 8 =
  10. 10.65 × 8 =
  11. 11.135 × 4 =
  12. 12.25 × 4 =
  13. 13.35 × 8 =
  14. 14.27 × 8 =
  15. 15.70 × 8 =
  16. 16.85 × 4 =
  17. 17.144 × 4 =
  18. 18.61 × 8 =
  19. 19.13 × 8 =
  20. 20.34 × 8 =
  21. 21.117 × 4 =
  22. 22.33 × 8 =
  23. 23.51 × 4 =
  24. 24.91 × 4 =
  25. 25.24 × 4 =
  26. 26.30 × 8 =
  27. 27.85 × 4 =
  28. 28.35 × 8 =
  29. 29.16 × 8 =
  30. 30.61 × 8 =
  31. 31.91 × 4 =
  32. 32.71 × 8 =
  33. 33.111 × 4 =
  34. 34.15 × 4 =
  35. 35.17 × 4 =
  36. 36.37 × 8 =
  37. 37.94 × 4 =
  38. 38.104 × 4 =
  39. 39.37 × 8 =
  40. 40.70 × 8 =

Answer key

  1. 180
  2. 444
  3. 344
  4. 200
  5. 296
  6. 108
  7. 220
  8. 296
  9. 376
  10. 520
  11. 540
  12. 100
  13. 280
  14. 216
  15. 560
  16. 340
  17. 576
  18. 488
  19. 104
  20. 272
  21. 468
  22. 264
  23. 204
  24. 364
  25. 96
  26. 240
  27. 340
  28. 280
  29. 128
  30. 488
  31. 364
  32. 568
  33. 444
  34. 60
  35. 68
  36. 296
  37. 376
  38. 416
  39. 296
  40. 560

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