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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 919 · 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. 1.94 × 4 =
  2. 2.52 × 8 =
  3. 3.72 × 4 =
  4. 4.13 × 8 =
  5. 5.141 × 4 =
  6. 6.24 × 8 =
  7. 7.131 × 4 =
  8. 8.127 × 4 =
  9. 9.28 × 8 =
  10. 10.116 × 4 =
  11. 11.20 × 8 =
  12. 12.30 × 8 =
  13. 13.82 × 4 =
  14. 14.13 × 8 =
  15. 15.12 × 8 =
  16. 16.33 × 8 =
  17. 17.20 × 8 =
  18. 18.143 × 4 =
  19. 19.28 × 8 =
  20. 20.17 × 8 =
  21. 21.66 × 8 =
  22. 22.133 × 4 =
  23. 23.55 × 8 =
  24. 24.153 × 4 =
  25. 25.57 × 4 =
  26. 26.50 × 4 =
  27. 27.12 × 8 =
  28. 28.51 × 4 =
  29. 29.98 × 4 =
  30. 30.156 × 4 =
  31. 31.31 × 8 =
  32. 32.78 × 4 =
  33. 33.17 × 8 =
  34. 34.66 × 4 =
  35. 35.20 × 4 =
  36. 36.54 × 8 =
  37. 37.92 × 4 =
  38. 38.147 × 4 =
  39. 39.122 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 376
  2. 416
  3. 288
  4. 104
  5. 564
  6. 192
  7. 524
  8. 508
  9. 224
  10. 464
  11. 160
  12. 240
  13. 328
  14. 104
  15. 96
  16. 264
  17. 160
  18. 572
  19. 224
  20. 136
  21. 528
  22. 532
  23. 440
  24. 612
  25. 228
  26. 200
  27. 96
  28. 204
  29. 392
  30. 624
  31. 248
  32. 312
  33. 136
  34. 264
  35. 80
  36. 432
  37. 368
  38. 588
  39. 488
  40. 112

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